[Lift] Re: can a Snippet call a Snippet?
I vote for this! Personally I do not completely understand all the
possibilities Failure gives and how to achieve these. BTW, I found
recently the appendix about Boxes disappeared from the printed Lift
book :(
On Jul 2, 5:55 pm, Timothy Perrett timo...@getintheloop.eu wrote:
We really ought to get around to writing a ³guides for boxes² - its easily
one of the most confusing concepts in lift (a magnitude less confusing
than when it was called Can[T])
Cheers, Tim
On 02/07/2009 14:46, David Pollak feeder.of.the.be...@gmail.com wrote:
On Wed, Jul 1, 2009 at 10:43 PM, g-man gregor...@gmail.com wrote:
I'm getting a Null Pointer: 'Trying to open an empty box', from S.attr
(todos).open_!
Don't use open_! It's dangerous.
That's why Boxes exist. They contain (or don't) something that may or may
not
exist. If you use open_! in your code, it is a major mistake (a logic
error)
unless the line before the open contains if (thing.isDefined) {
Thanks,
David
Here's my layout:
todo.html template
lift:TD.listTodos todos=todos
--- Todo list table stuff ---
lift:TD.listTags tags=tags
--- Tag list table stuff (where the selection to filter comes from)
---
TD.scala snippet =
// this arity is for the default 'show all Todos' condition
def list(html: NodeSeq) = {
val id = S.attr(todos).open_!
// this arity is for the 'filter by Tag' case
def list(filterTag: Long)(html: NodeSeq) = {
val id = S.attr(todos).open_!
The two snippet methods could probably be combined with a (param:
Long*) signature, but Scala does not seem to care right now. The
default works perfectly, but when a Tag is selected to filter by, the
'todos' id Box cannot be seen when attempting to open.
Is this because it is probably out of scope? I am using an ajaxbutton
to make the call and pass in the tag.id http://tag.id , but it is hard to
see how an
S.attr could exist for one request, then be gone for the next, unless
I am confusing this with a stateful attribute.
On Jul 1, 2:42 pm, David Pollak feeder.of.the.be...@gmail.com wrote:
On Wed, Jul 1, 2009 at 2:28 PM, g-man gregor...@gmail.com wrote:
I will look into the nested snippets.
For expediency, I folded all the snippets that interact with my
template into one file, so I can concentrate on the business logic.
For my Todo app enhancement, I need to pass the id of my selected Tag
(which I have confirmed is correctly gathered from the page request)
in to the TD.list method, so that the filtered Todos (those bearing
the required Tag) will be found and rendered.
My problem is that if I try to pass an additional argument (tagId:
Long), the TD.list method is not happy and will not even render the
template.
I have tried both paired (html: NodeSeq, tagId: Long) as well as
curried style (html: NodeSeq)(tagId: Long), but neither works.
Try:
list(tagId: Long)(html: NodeSeq): NodeSeq
That way list(44L) _ becomes a NodeSeq = NodeSeq
There must be a simple way to accomplish such a common task!
Thanks to all the members for commenting...
On Jun 29, 11:25 pm, marius d. marius.dan...@gmail.com wrote:
Or you can use S.locateMappedSnippet ... but first try to see if
nested snippet won't do the trick for you ...
On Jun 30, 10:17 am, marius d. marius.dan...@gmail.com wrote:
Can you paste some code?
Essentially we support nested snippets so your snippet can
simply
return a markup containing another snippet and it will be
invoked. If
you really want to manually invoke a snippet from another
snippet
and
if you are not using StatefulSnippets you can just instantiate
the
class and call your function and pass it the right NodeSeq.
Br's,
Marius
On Jun 30, 5:36 am, g-man gregor...@gmail.com wrote:
I am enhancing the Todo app by adding tags.
I have retained the TD.scala snippet to manage the Todos on
my
page,
and added a TG.scala snippet to handle tags on the same
page,
which
works well for creating new and listing in both cases.
Now I want to filter my Todos list by a Tag instance I
select
from my
list, and therefore need to pass the id of the selected tag
over from
the TG snippet to the TD snippet, where it can be used as a
filter
argument for a find method.
The problem is that scala says it cannot find snippet TD,
whose
method
I am calling as TD.list from the TG.scala snippet. I have
tried all
kinds of explicit importing, but no luck.
So, can a snippet call a snippet, or is that controlled
only
from
the
web page?- Hide quoted text -
- Show quoted text -
--
Lift, the simply functional web frameworkhttp://liftweb.net
http://liftweb.net
Beginning
[Lift] Re: can a Snippet call a Snippet?
Yes, it's available on the APress website. It was omitted due to an issue
with the APress workflow :(
http://www.apress.com/book/view/1430224215
Derek
On Fri, Jul 3, 2009 at 8:22 AM, Alexander Azarov alaz...@gmail.com wrote:
I vote for this! Personally I do not completely understand all the
possibilities Failure gives and how to achieve these. BTW, I found
recently the appendix about Boxes disappeared from the printed Lift
book :(
On Jul 2, 5:55 pm, Timothy Perrett timo...@getintheloop.eu wrote:
We really ought to get around to writing a ³guides for boxes² - its
easily
one of the most confusing concepts in lift (a magnitude less
confusing
than when it was called Can[T])
Cheers, Tim
On 02/07/2009 14:46, David Pollak feeder.of.the.be...@gmail.com
wrote:
On Wed, Jul 1, 2009 at 10:43 PM, g-man gregor...@gmail.com wrote:
I'm getting a Null Pointer: 'Trying to open an empty box', from S.attr
(todos).open_!
Don't use open_! It's dangerous.
That's why Boxes exist. They contain (or don't) something that may or
may not
exist. If you use open_! in your code, it is a major mistake (a logic
error)
unless the line before the open contains if (thing.isDefined) {
Thanks,
David
Here's my layout:
todo.html template
lift:TD.listTodos todos=todos
--- Todo list table stuff ---
lift:TD.listTags tags=tags
--- Tag list table stuff (where the selection to filter comes from)
---
TD.scala snippet =
// this arity is for the default 'show all Todos' condition
def list(html: NodeSeq) = {
val id = S.attr(todos).open_!
// this arity is for the 'filter by Tag' case
def list(filterTag: Long)(html: NodeSeq) = {
val id = S.attr(todos).open_!
The two snippet methods could probably be combined with a (param:
Long*) signature, but Scala does not seem to care right now. The
default works perfectly, but when a Tag is selected to filter by, the
'todos' id Box cannot be seen when attempting to open.
Is this because it is probably out of scope? I am using an ajaxbutton
to make the call and pass in the tag.id http://tag.id , but it is
hard to
see how an
S.attr could exist for one request, then be gone for the next, unless
I am confusing this with a stateful attribute.
On Jul 1, 2:42 pm, David Pollak feeder.of.the.be...@gmail.com
wrote:
On Wed, Jul 1, 2009 at 2:28 PM, g-man gregor...@gmail.com wrote:
I will look into the nested snippets.
For expediency, I folded all the snippets that interact with my
template into one file, so I can concentrate on the business
logic.
For my Todo app enhancement, I need to pass the id of my
selected Tag
(which I have confirmed is correctly gathered from the page
request)
in to the TD.list method, so that the filtered Todos (those
bearing
the required Tag) will be found and rendered.
My problem is that if I try to pass an additional argument
(tagId:
Long), the TD.list method is not happy and will not even render
the
template.
I have tried both paired (html: NodeSeq, tagId: Long) as well as
curried style (html: NodeSeq)(tagId: Long), but neither works.
Try:
list(tagId: Long)(html: NodeSeq): NodeSeq
That way list(44L) _ becomes a NodeSeq = NodeSeq
There must be a simple way to accomplish such a common task!
Thanks to all the members for commenting...
On Jun 29, 11:25 pm, marius d. marius.dan...@gmail.com
wrote:
Or you can use S.locateMappedSnippet ... but first try to see
if
nested snippet won't do the trick for you ...
On Jun 30, 10:17 am, marius d. marius.dan...@gmail.com
wrote:
Can you paste some code?
Essentially we support nested snippets so your snippet can
simply
return a markup containing another snippet and it will be
invoked. If
you really want to manually invoke a snippet from another
snippet
and
if you are not using StatefulSnippets you can just
instantiate
the
class and call your function and pass it the right
NodeSeq.
Br's,
Marius
On Jun 30, 5:36 am, g-man gregor...@gmail.com wrote:
I am enhancing the Todo app by adding tags.
I have retained the TD.scala snippet to manage the
Todos on my
page,
and added a TG.scala snippet to handle tags on the same
page,
which
works well for creating new and listing in both cases.
Now I want to filter my Todos list by a Tag instance I
select
from my
list, and therefore need to pass the id of the selected
tag
over from
the TG snippet to the TD snippet, where it can be used
as a
filter
argument for a find method.
The problem is that scala says it cannot find snippet
TD,
whose
method
I am calling as TD.list from the TG.scala
[Lift] Re: can a Snippet call a Snippet?
On Wed, Jul 1, 2009 at 10:43 PM, g-man gregor...@gmail.com wrote:
I'm getting a Null Pointer: 'Trying to open an empty box', from S.attr
(todos).open_!
Don't use open_! It's dangerous.
That's why Boxes exist. They contain (or don't) something that may or may
not exist. If you use open_! in your code, it is a major mistake (a logic
error) unless the line before the open contains if (thing.isDefined) {
Thanks,
David
Here's my layout:
todo.html template
lift:TD.listTodos todos=todos
--- Todo list table stuff ---
lift:TD.listTags tags=tags
--- Tag list table stuff (where the selection to filter comes from)
---
TD.scala snippet =
// this arity is for the default 'show all Todos' condition
def list(html: NodeSeq) = {
val id = S.attr(todos).open_!
// this arity is for the 'filter by Tag' case
def list(filterTag: Long)(html: NodeSeq) = {
val id = S.attr(todos).open_!
The two snippet methods could probably be combined with a (param:
Long*) signature, but Scala does not seem to care right now. The
default works perfectly, but when a Tag is selected to filter by, the
'todos' id Box cannot be seen when attempting to open.
Is this because it is probably out of scope? I am using an ajaxbutton
to make the call and pass in the tag.id, but it is hard to see how an
S.attr could exist for one request, then be gone for the next, unless
I am confusing this with a stateful attribute.
On Jul 1, 2:42 pm, David Pollak feeder.of.the.be...@gmail.com wrote:
On Wed, Jul 1, 2009 at 2:28 PM, g-man gregor...@gmail.com wrote:
I will look into the nested snippets.
For expediency, I folded all the snippets that interact with my
template into one file, so I can concentrate on the business logic.
For my Todo app enhancement, I need to pass the id of my selected Tag
(which I have confirmed is correctly gathered from the page request)
in to the TD.list method, so that the filtered Todos (those bearing
the required Tag) will be found and rendered.
My problem is that if I try to pass an additional argument (tagId:
Long), the TD.list method is not happy and will not even render the
template.
I have tried both paired (html: NodeSeq, tagId: Long) as well as
curried style (html: NodeSeq)(tagId: Long), but neither works.
Try:
list(tagId: Long)(html: NodeSeq): NodeSeq
That way list(44L) _ becomes a NodeSeq = NodeSeq
There must be a simple way to accomplish such a common task!
Thanks to all the members for commenting...
On Jun 29, 11:25 pm, marius d. marius.dan...@gmail.com wrote:
Or you can use S.locateMappedSnippet ... but first try to see if
nested snippet won't do the trick for you ...
On Jun 30, 10:17 am, marius d. marius.dan...@gmail.com wrote:
Can you paste some code?
Essentially we support nested snippets so your snippet can simply
return a markup containing another snippet and it will be invoked.
If
you really want to manually invoke a snippet from another snippet
and
if you are not using StatefulSnippets you can just instantiate the
class and call your function and pass it the right NodeSeq.
Br's,
Marius
On Jun 30, 5:36 am, g-man gregor...@gmail.com wrote:
I am enhancing the Todo app by adding tags.
I have retained the TD.scala snippet to manage the Todos on my
page,
and added a TG.scala snippet to handle tags on the same page,
which
works well for creating new and listing in both cases.
Now I want to filter my Todos list by a Tag instance I select
from my
list, and therefore need to pass the id of the selected tag over
from
the TG snippet to the TD snippet, where it can be used as a
filter
argument for a find method.
The problem is that scala says it cannot find snippet TD, whose
method
I am calling as TD.list from the TG.scala snippet. I have tried
all
kinds of explicit importing, but no luck.
So, can a snippet call a snippet, or is that controlled only
from
the
web page?- Hide quoted text -
- Show quoted text -
--
Lift, the simply functional web frameworkhttp://liftweb.net
Beginning Scalahttp://www.apress.com/book/view/1430219890
Follow me:http://twitter.com/dpp
Git some:http://github.com/dpp
--
Lift, the simply functional web framework http://liftweb.net
Beginning Scala http://www.apress.com/book/view/1430219890
Follow me: http://twitter.com/dpp
Git some: http://github.com/dpp
--~--~-~--~~~---~--~~
You received this message because you are subscribed to the Google Groups
Lift group.
To post to this group, send email to liftweb@googlegroups.com
To unsubscribe from this group, send email to
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[Lift] Re: can a Snippet call a Snippet?
The open_! came right from the 'Getting Started' Todo tutorial I am
enhancing:
Listing 17: list method in TD class
def list(html: NodeSeq) = {
val id = S.attr(all_id).open_!
Nevertheless, the question remains: How can I filter the Todo items by
a Tag and render the list?
I guess I could always link to a new page and let the template drive
the snippet, but I kind of wanted to keep one page open and just do
AJAX stuff within div elements.
Thanks again..
On Jul 2, 5:46 am, David Pollak feeder.of.the.be...@gmail.com wrote:
On Wed, Jul 1, 2009 at 10:43 PM, g-man gregor...@gmail.com wrote:
I'm getting a Null Pointer: 'Trying to open an empty box', from S.attr
(todos).open_!
Don't use open_! It's dangerous.
That's why Boxes exist. They contain (or don't) something that may or may
not exist. If you use open_! in your code, it is a major mistake (a logic
error) unless the line before the open contains if (thing.isDefined) {
Thanks,
David
Here's my layout:
todo.html template
lift:TD.listTodos todos=todos
--- Todo list table stuff ---
lift:TD.listTags tags=tags
--- Tag list table stuff (where the selection to filter comes from)
---
TD.scala snippet =
// this arity is for the default 'show all Todos' condition
def list(html: NodeSeq) = {
val id = S.attr(todos).open_!
// this arity is for the 'filter by Tag' case
def list(filterTag: Long)(html: NodeSeq) = {
val id = S.attr(todos).open_!
The two snippet methods could probably be combined with a (param:
Long*) signature, but Scala does not seem to care right now. The
default works perfectly, but when a Tag is selected to filter by, the
'todos' id Box cannot be seen when attempting to open.
Is this because it is probably out of scope? I am using an ajaxbutton
to make the call and pass in the tag.id, but it is hard to see how an
S.attr could exist for one request, then be gone for the next, unless
I am confusing this with a stateful attribute.
On Jul 1, 2:42 pm, David Pollak feeder.of.the.be...@gmail.com wrote:
On Wed, Jul 1, 2009 at 2:28 PM, g-man gregor...@gmail.com wrote:
I will look into the nested snippets.
For expediency, I folded all the snippets that interact with my
template into one file, so I can concentrate on the business logic.
For my Todo app enhancement, I need to pass the id of my selected Tag
(which I have confirmed is correctly gathered from the page request)
in to the TD.list method, so that the filtered Todos (those bearing
the required Tag) will be found and rendered.
My problem is that if I try to pass an additional argument (tagId:
Long), the TD.list method is not happy and will not even render the
template.
I have tried both paired (html: NodeSeq, tagId: Long) as well as
curried style (html: NodeSeq)(tagId: Long), but neither works.
Try:
list(tagId: Long)(html: NodeSeq): NodeSeq
That way list(44L) _ becomes a NodeSeq = NodeSeq
There must be a simple way to accomplish such a common task!
Thanks to all the members for commenting...
On Jun 29, 11:25 pm, marius d. marius.dan...@gmail.com wrote:
Or you can use S.locateMappedSnippet ... but first try to see if
nested snippet won't do the trick for you ...
On Jun 30, 10:17 am, marius d. marius.dan...@gmail.com wrote:
Can you paste some code?
Essentially we support nested snippets so your snippet can simply
return a markup containing another snippet and it will be invoked.
If
you really want to manually invoke a snippet from another snippet
and
if you are not using StatefulSnippets you can just instantiate the
class and call your function and pass it the right NodeSeq.
Br's,
Marius
On Jun 30, 5:36 am, g-man gregor...@gmail.com wrote:
I am enhancing the Todo app by adding tags.
I have retained the TD.scala snippet to manage the Todos on my
page,
and added a TG.scala snippet to handle tags on the same page,
which
works well for creating new and listing in both cases.
Now I want to filter my Todos list by a Tag instance I select
from my
list, and therefore need to pass the id of the selected tag over
from
the TG snippet to the TD snippet, where it can be used as a
filter
argument for a find method.
The problem is that scala says it cannot find snippet TD, whose
method
I am calling as TD.list from the TG.scala snippet. I have tried
all
kinds of explicit importing, but no luck.
So, can a snippet call a snippet, or is that controlled only
from
the
web page?- Hide quoted text -
- Show quoted text -
--
Lift, the simply functional web frameworkhttp://liftweb.net
Beginning Scalahttp://www.apress.com/book/view/1430219890
Follow me:http://twitter.com/dpp
Git some:http://github.com/dpp
--
[Lift] Re: can a Snippet call a Snippet?
On Thu, Jul 2, 2009 at 6:55 AM, Timothy Perrett timo...@getintheloop.euwrote:
We really ought to get around to writing a “guides for boxes” - its easily
one of the most confusing concepts in lift (a magnitude less confusing
than when it was called Can[T])
http://blog.lostlake.org/index.php?/archives/50-The-Scala-Option-class-and-how-lift-uses-it.html
Options and Boxes are very similar, although Boxes have Failure as well as
Empty (None)
Also, note that the code in the example is Scala 2.3 era code, so some
syntax has changed.
Cheers, Tim
On 02/07/2009 14:46, David Pollak feeder.of.the.be...@gmail.com wrote:
On Wed, Jul 1, 2009 at 10:43 PM, g-man gregor...@gmail.com wrote:
I'm getting a Null Pointer: 'Trying to open an empty box', from S.attr
(todos).open_!
Don't use open_! It's dangerous.
That's why Boxes exist. They contain (or don't) something that may or may
not exist. If you use open_! in your code, it is a major mistake (a logic
error) unless the line before the open contains if (thing.isDefined) {
Thanks,
David
Here's my layout:
todo.html template
lift:TD.listTodos todos=todos
--- Todo list table stuff ---
lift:TD.listTags tags=tags
--- Tag list table stuff (where the selection to filter comes from)
---
TD.scala snippet =
// this arity is for the default 'show all Todos' condition
def list(html: NodeSeq) = {
val id = S.attr(todos).open_!
// this arity is for the 'filter by Tag' case
def list(filterTag: Long)(html: NodeSeq) = {
val id = S.attr(todos).open_!
The two snippet methods could probably be combined with a (param:
Long*) signature, but Scala does not seem to care right now. The
default works perfectly, but when a Tag is selected to filter by, the
'todos' id Box cannot be seen when attempting to open.
Is this because it is probably out of scope? I am using an ajaxbutton
to make the call and pass in the tag.id http://tag.id , but it is hard
to see how an
S.attr could exist for one request, then be gone for the next, unless
I am confusing this with a stateful attribute.
On Jul 1, 2:42 pm, David Pollak feeder.of.the.be...@gmail.com wrote:
On Wed, Jul 1, 2009 at 2:28 PM, g-man gregor...@gmail.com wrote:
I will look into the nested snippets.
For expediency, I folded all the snippets that interact with my
template into one file, so I can concentrate on the business logic.
For my Todo app enhancement, I need to pass the id of my selected Tag
(which I have confirmed is correctly gathered from the page request)
in to the TD.list method, so that the filtered Todos (those bearing
the required Tag) will be found and rendered.
My problem is that if I try to pass an additional argument (tagId:
Long), the TD.list method is not happy and will not even render the
template.
I have tried both paired (html: NodeSeq, tagId: Long) as well as
curried style (html: NodeSeq)(tagId: Long), but neither works.
Try:
list(tagId: Long)(html: NodeSeq): NodeSeq
That way list(44L) _ becomes a NodeSeq = NodeSeq
There must be a simple way to accomplish such a common task!
Thanks to all the members for commenting...
On Jun 29, 11:25 pm, marius d. marius.dan...@gmail.com wrote:
Or you can use S.locateMappedSnippet ... but first try to see if
nested snippet won't do the trick for you ...
On Jun 30, 10:17 am, marius d. marius.dan...@gmail.com wrote:
Can you paste some code?
Essentially we support nested snippets so your snippet can simply
return a markup containing another snippet and it will be invoked.
If
you really want to manually invoke a snippet from another snippet
and
if you are not using StatefulSnippets you can just instantiate the
class and call your function and pass it the right NodeSeq.
Br's,
Marius
On Jun 30, 5:36 am, g-man gregor...@gmail.com wrote:
I am enhancing the Todo app by adding tags.
I have retained the TD.scala snippet to manage the Todos on my
page,
and added a TG.scala snippet to handle tags on the same page,
which
works well for creating new and listing in both cases.
Now I want to filter my Todos list by a Tag instance I select
from my
list, and therefore need to pass the id of the selected tag over
from
the TG snippet to the TD snippet, where it can be used as a
filter
argument for a find method.
The problem is that scala says it cannot find snippet TD, whose
method
I am calling as TD.list from the TG.scala snippet. I have tried
all
kinds of explicit importing, but no luck.
So, can a snippet call a snippet, or is that controlled only
from
the
web page?- Hide quoted text -
- Show quoted text -
--
Lift, the simply functional web frameworkhttp://liftweb.net
http://liftweb.net
Beginning
[Lift] Re: can a Snippet call a Snippet?
But of course I know this :-) Thinking back to when I first started scala a couple of years ago I just couldn¹t understand why you wanted to put something in a box... Your article does a good job of explaining, but I think we could do with some specific documentation. Cheers, Tim On 02/07/2009 15:04, David Pollak feeder.of.the.be...@gmail.com wrote: http://blog.lostlake.org/index.php?/archives/50-The-Scala-Option-class-and-how -lift-uses-it.html Options and Boxes are very similar, although Boxes have Failure as well as Empty (None) Also, note that the code in the example is Scala 2.3 era code, so some syntax has changed. --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Lift group. To post to this group, send email to liftweb@googlegroups.com To unsubscribe from this group, send email to liftweb+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/liftweb?hl=en -~--~~~~--~~--~--~---
[Lift] Re: can a Snippet call a Snippet?
We really ought to get around to writing a ³guides for boxes² - its easily
one of the most confusing concepts in lift (a magnitude less confusing
than when it was called Can[T])
Cheers, Tim
On 02/07/2009 14:46, David Pollak feeder.of.the.be...@gmail.com wrote:
On Wed, Jul 1, 2009 at 10:43 PM, g-man gregor...@gmail.com wrote:
I'm getting a Null Pointer: 'Trying to open an empty box', from S.attr
(todos).open_!
Don't use open_! It's dangerous.
That's why Boxes exist. They contain (or don't) something that may or may not
exist. If you use open_! in your code, it is a major mistake (a logic error)
unless the line before the open contains if (thing.isDefined) {
Thanks,
David
Here's my layout:
todo.html template
lift:TD.listTodos todos=todos
--- Todo list table stuff ---
lift:TD.listTags tags=tags
--- Tag list table stuff (where the selection to filter comes from)
---
TD.scala snippet =
// this arity is for the default 'show all Todos' condition
def list(html: NodeSeq) = {
val id = S.attr(todos).open_!
// this arity is for the 'filter by Tag' case
def list(filterTag: Long)(html: NodeSeq) = {
val id = S.attr(todos).open_!
The two snippet methods could probably be combined with a (param:
Long*) signature, but Scala does not seem to care right now. The
default works perfectly, but when a Tag is selected to filter by, the
'todos' id Box cannot be seen when attempting to open.
Is this because it is probably out of scope? I am using an ajaxbutton
to make the call and pass in the tag.id http://tag.id , but it is hard to
see how an
S.attr could exist for one request, then be gone for the next, unless
I am confusing this with a stateful attribute.
On Jul 1, 2:42 pm, David Pollak feeder.of.the.be...@gmail.com wrote:
On Wed, Jul 1, 2009 at 2:28 PM, g-man gregor...@gmail.com wrote:
I will look into the nested snippets.
For expediency, I folded all the snippets that interact with my
template into one file, so I can concentrate on the business logic.
For my Todo app enhancement, I need to pass the id of my selected Tag
(which I have confirmed is correctly gathered from the page request)
in to the TD.list method, so that the filtered Todos (those bearing
the required Tag) will be found and rendered.
My problem is that if I try to pass an additional argument (tagId:
Long), the TD.list method is not happy and will not even render the
template.
I have tried both paired (html: NodeSeq, tagId: Long) as well as
curried style (html: NodeSeq)(tagId: Long), but neither works.
Try:
list(tagId: Long)(html: NodeSeq): NodeSeq
That way list(44L) _ becomes a NodeSeq = NodeSeq
There must be a simple way to accomplish such a common task!
Thanks to all the members for commenting...
On Jun 29, 11:25 pm, marius d. marius.dan...@gmail.com wrote:
Or you can use S.locateMappedSnippet ... but first try to see if
nested snippet won't do the trick for you ...
On Jun 30, 10:17 am, marius d. marius.dan...@gmail.com wrote:
Can you paste some code?
Essentially we support nested snippets so your snippet can simply
return a markup containing another snippet and it will be
invoked. If
you really want to manually invoke a snippet from another snippet
and
if you are not using StatefulSnippets you can just instantiate
the
class and call your function and pass it the right NodeSeq.
Br's,
Marius
On Jun 30, 5:36 am, g-man gregor...@gmail.com wrote:
I am enhancing the Todo app by adding tags.
I have retained the TD.scala snippet to manage the Todos on my
page,
and added a TG.scala snippet to handle tags on the same page,
which
works well for creating new and listing in both cases.
Now I want to filter my Todos list by a Tag instance I select
from my
list, and therefore need to pass the id of the selected tag
over from
the TG snippet to the TD snippet, where it can be used as a
filter
argument for a find method.
The problem is that scala says it cannot find snippet TD,
whose
method
I am calling as TD.list from the TG.scala snippet. I have
tried all
kinds of explicit importing, but no luck.
So, can a snippet call a snippet, or is that controlled only
from
the
web page?- Hide quoted text -
- Show quoted text -
--
Lift, the simply functional web frameworkhttp://liftweb.net
http://liftweb.net
Beginning Scalahttp://www.apress.com/book/view/1430219890
http://www.apress.com/book/view/1430219890
Follow me:http://twitter.com/dpp
Git some:http://github.com/dpp
--~--~-~--~~~---~--~~
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To unsubscribe from this
[Lift] Re: can a Snippet call a Snippet?
I will look into the nested snippets. For expediency, I folded all the snippets that interact with my template into one file, so I can concentrate on the business logic. For my Todo app enhancement, I need to pass the id of my selected Tag (which I have confirmed is correctly gathered from the page request) in to the TD.list method, so that the filtered Todos (those bearing the required Tag) will be found and rendered. My problem is that if I try to pass an additional argument (tagId: Long), the TD.list method is not happy and will not even render the template. I have tried both paired (html: NodeSeq, tagId: Long) as well as curried style (html: NodeSeq)(tagId: Long), but neither works. There must be a simple way to accomplish such a common task! Thanks to all the members for commenting... On Jun 29, 11:25 pm, marius d. marius.dan...@gmail.com wrote: Or you can use S.locateMappedSnippet ... but first try to see if nested snippet won't do the trick for you ... On Jun 30, 10:17 am, marius d. marius.dan...@gmail.com wrote: Can you paste some code? Essentially we support nested snippets so your snippet can simply return a markup containing another snippet and it will be invoked. If you really want to manually invoke a snippet from another snippet and if you are not using StatefulSnippets you can just instantiate the class and call your function and pass it the right NodeSeq. Br's, Marius On Jun 30, 5:36 am, g-man gregor...@gmail.com wrote: I am enhancing the Todo app by adding tags. I have retained the TD.scala snippet to manage the Todos on my page, and added a TG.scala snippet to handle tags on the same page, which works well for creating new and listing in both cases. Now I want to filter my Todos list by a Tag instance I select from my list, and therefore need to pass the id of the selected tag over from the TG snippet to the TD snippet, where it can be used as a filter argument for a find method. The problem is that scala says it cannot find snippet TD, whose method I am calling as TD.list from the TG.scala snippet. I have tried all kinds of explicit importing, but no luck. So, can a snippet call a snippet, or is that controlled only from the web page?- Hide quoted text - - Show quoted text - --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Lift group. To post to this group, send email to liftweb@googlegroups.com To unsubscribe from this group, send email to liftweb+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/liftweb?hl=en -~--~~~~--~~--~--~---
[Lift] Re: can a Snippet call a Snippet?
On Wed, Jul 1, 2009 at 2:28 PM, g-man gregor...@gmail.com wrote: I will look into the nested snippets. For expediency, I folded all the snippets that interact with my template into one file, so I can concentrate on the business logic. For my Todo app enhancement, I need to pass the id of my selected Tag (which I have confirmed is correctly gathered from the page request) in to the TD.list method, so that the filtered Todos (those bearing the required Tag) will be found and rendered. My problem is that if I try to pass an additional argument (tagId: Long), the TD.list method is not happy and will not even render the template. I have tried both paired (html: NodeSeq, tagId: Long) as well as curried style (html: NodeSeq)(tagId: Long), but neither works. Try: list(tagId: Long)(html: NodeSeq): NodeSeq That way list(44L) _ becomes a NodeSeq = NodeSeq There must be a simple way to accomplish such a common task! Thanks to all the members for commenting... On Jun 29, 11:25 pm, marius d. marius.dan...@gmail.com wrote: Or you can use S.locateMappedSnippet ... but first try to see if nested snippet won't do the trick for you ... On Jun 30, 10:17 am, marius d. marius.dan...@gmail.com wrote: Can you paste some code? Essentially we support nested snippets so your snippet can simply return a markup containing another snippet and it will be invoked. If you really want to manually invoke a snippet from another snippet and if you are not using StatefulSnippets you can just instantiate the class and call your function and pass it the right NodeSeq. Br's, Marius On Jun 30, 5:36 am, g-man gregor...@gmail.com wrote: I am enhancing the Todo app by adding tags. I have retained the TD.scala snippet to manage the Todos on my page, and added a TG.scala snippet to handle tags on the same page, which works well for creating new and listing in both cases. Now I want to filter my Todos list by a Tag instance I select from my list, and therefore need to pass the id of the selected tag over from the TG snippet to the TD snippet, where it can be used as a filter argument for a find method. The problem is that scala says it cannot find snippet TD, whose method I am calling as TD.list from the TG.scala snippet. I have tried all kinds of explicit importing, but no luck. So, can a snippet call a snippet, or is that controlled only from the web page?- Hide quoted text - - Show quoted text - -- Lift, the simply functional web framework http://liftweb.net Beginning Scala http://www.apress.com/book/view/1430219890 Follow me: http://twitter.com/dpp Git some: http://github.com/dpp --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Lift group. To post to this group, send email to liftweb@googlegroups.com To unsubscribe from this group, send email to liftweb+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/liftweb?hl=en -~--~~~~--~~--~--~---
[Lift] Re: can a Snippet call a Snippet?
I'm getting a Null Pointer: 'Trying to open an empty box', from S.attr
(todos).open_!
Here's my layout:
todo.html template
lift:TD.listTodos todos=todos
--- Todo list table stuff ---
lift:TD.listTags tags=tags
--- Tag list table stuff (where the selection to filter comes from)
---
TD.scala snippet =
// this arity is for the default 'show all Todos' condition
def list(html: NodeSeq) = {
val id = S.attr(todos).open_!
// this arity is for the 'filter by Tag' case
def list(filterTag: Long)(html: NodeSeq) = {
val id = S.attr(todos).open_!
The two snippet methods could probably be combined with a (param:
Long*) signature, but Scala does not seem to care right now. The
default works perfectly, but when a Tag is selected to filter by, the
'todos' id Box cannot be seen when attempting to open.
Is this because it is probably out of scope? I am using an ajaxbutton
to make the call and pass in the tag.id, but it is hard to see how an
S.attr could exist for one request, then be gone for the next, unless
I am confusing this with a stateful attribute.
On Jul 1, 2:42 pm, David Pollak feeder.of.the.be...@gmail.com wrote:
On Wed, Jul 1, 2009 at 2:28 PM, g-man gregor...@gmail.com wrote:
I will look into the nested snippets.
For expediency, I folded all the snippets that interact with my
template into one file, so I can concentrate on the business logic.
For my Todo app enhancement, I need to pass the id of my selected Tag
(which I have confirmed is correctly gathered from the page request)
in to the TD.list method, so that the filtered Todos (those bearing
the required Tag) will be found and rendered.
My problem is that if I try to pass an additional argument (tagId:
Long), the TD.list method is not happy and will not even render the
template.
I have tried both paired (html: NodeSeq, tagId: Long) as well as
curried style (html: NodeSeq)(tagId: Long), but neither works.
Try:
list(tagId: Long)(html: NodeSeq): NodeSeq
That way list(44L) _ becomes a NodeSeq = NodeSeq
There must be a simple way to accomplish such a common task!
Thanks to all the members for commenting...
On Jun 29, 11:25 pm, marius d. marius.dan...@gmail.com wrote:
Or you can use S.locateMappedSnippet ... but first try to see if
nested snippet won't do the trick for you ...
On Jun 30, 10:17 am, marius d. marius.dan...@gmail.com wrote:
Can you paste some code?
Essentially we support nested snippets so your snippet can simply
return a markup containing another snippet and it will be invoked. If
you really want to manually invoke a snippet from another snippet and
if you are not using StatefulSnippets you can just instantiate the
class and call your function and pass it the right NodeSeq.
Br's,
Marius
On Jun 30, 5:36 am, g-man gregor...@gmail.com wrote:
I am enhancing the Todo app by adding tags.
I have retained the TD.scala snippet to manage the Todos on my page,
and added a TG.scala snippet to handle tags on the same page, which
works well for creating new and listing in both cases.
Now I want to filter my Todos list by a Tag instance I select from my
list, and therefore need to pass the id of the selected tag over from
the TG snippet to the TD snippet, where it can be used as a filter
argument for a find method.
The problem is that scala says it cannot find snippet TD, whose
method
I am calling as TD.list from the TG.scala snippet. I have tried all
kinds of explicit importing, but no luck.
So, can a snippet call a snippet, or is that controlled only from
the
web page?- Hide quoted text -
- Show quoted text -
--
Lift, the simply functional web frameworkhttp://liftweb.net
Beginning Scalahttp://www.apress.com/book/view/1430219890
Follow me:http://twitter.com/dpp
Git some:http://github.com/dpp
--~--~-~--~~~---~--~~
You received this message because you are subscribed to the Google Groups
Lift group.
To post to this group, send email to liftweb@googlegroups.com
To unsubscribe from this group, send email to
liftweb+unsubscr...@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/liftweb?hl=en
-~--~~~~--~~--~--~---
[Lift] Re: can a Snippet call a Snippet?
Where is the second list getting called from? Code?
-
g-mangregor...@gmail.com wrote:
I'm getting a Null Pointer: 'Trying to open an empty box', from S.attr
(todos).open_!
Here's my layout:
todo.html template
lift:TD.listTodos todos=todos
--- Todo list table stuff ---
lift:TD.listTags tags=tags
--- Tag list table stuff (where the selection to filter comes from)
---
TD.scala snippet =
// this arity is for the default 'show all Todos' condition
def list(html: NodeSeq) = {
val id = S.attr(todos).open_!
// this arity is for the 'filter by Tag' case
def list(filterTag: Long)(html: NodeSeq) = {
val id = S.attr(todos).open_!
The two snippet methods could probably be combined with a (param:
Long*) signature, but Scala does not seem to care right now. The
default works perfectly, but when a Tag is selected to filter by, the
'todos' id Box cannot be seen when attempting to open.
Is this because it is probably out of scope? I am using an ajaxbutton
to make the call and pass in the tag.id, but it is hard to see how an
S.attr could exist for one request, then be gone for the next, unless
I am confusing this with a stateful attribute.
On Jul 1, 2:42 pm, David Pollak feeder.of.the.be...@gmail.com wrote:
On Wed, Jul 1, 2009 at 2:28 PM, g-man gregor...@gmail.com wrote:
I will look into the nested snippets.
For expediency, I folded all the snippets that interact with my
template into one file, so I can concentrate on the business logic.
For my Todo app enhancement, I need to pass the id of my selected Tag
(which I have confirmed is correctly gathered from the page request)
in to the TD.list method, so that the filtered Todos (those bearing
the required Tag) will be found and rendered.
My problem is that if I try to pass an additional argument (tagId:
Long), the TD.list method is not happy and will not even render the
template.
I have tried both paired (html: NodeSeq, tagId: Long) as well as
curried style (html: NodeSeq)(tagId: Long), but neither works.
Try:
list(tagId: Long)(html: NodeSeq): NodeSeq
That way list(44L) _ becomes a NodeSeq = NodeSeq
There must be a simple way to accomplish such a common task!
Thanks to all the members for commenting...
On Jun 29, 11:25 pm, marius d. marius.dan...@gmail.com wrote:
Or you can use S.locateMappedSnippet ... but first try to see if
nested snippet won't do the trick for you ...
On Jun 30, 10:17 am, marius d. marius.dan...@gmail.com wrote:
Can you paste some code?
Essentially we support nested snippets so your snippet can simply
return a markup containing another snippet and it will be invoked. If
you really want to manually invoke a snippet from another snippet and
if you are not using StatefulSnippets you can just instantiate the
class and call your function and pass it the right NodeSeq.
Br's,
Marius
On Jun 30, 5:36 am, g-man gregor...@gmail.com wrote:
I am enhancing the Todo app by adding tags.
I have retained the TD.scala snippet to manage the Todos on my page,
and added a TG.scala snippet to handle tags on the same page, which
works well for creating new and listing in both cases.
Now I want to filter my Todos list by a Tag instance I select from my
list, and therefore need to pass the id of the selected tag over from
the TG snippet to the TD snippet, where it can be used as a filter
argument for a find method.
The problem is that scala says it cannot find snippet TD, whose
method
I am calling as TD.list from the TG.scala snippet. I have tried all
kinds of explicit importing, but no luck.
So, can a snippet call a snippet, or is that controlled only from
the
web page?- Hide quoted text -
- Show quoted text -
--
Lift, the simply functional web frameworkhttp://liftweb.net
Beginning Scalahttp://www.apress.com/book/view/1430219890
Follow me:http://twitter.com/dpp
Git some:http://github.com/dpp
--~--~-~--~~~---~--~~
You received this message because you are subscribed to the Google Groups
Lift group.
To post to this group, send email to liftweb@googlegroups.com
To unsubscribe from this group, send email to
liftweb+unsubscr...@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/liftweb?hl=en
-~--~~~~--~~--~--~---
[Lift] Re: can a Snippet call a Snippet?
Can you paste some code? Essentially we support nested snippets so your snippet can simply return a markup containing another snippet and it will be invoked. If you really want to manually invoke a snippet from another snippet and if you are not using StatefulSnippets you can just instantiate the class and call your function and pass it the right NodeSeq. Br's, Marius On Jun 30, 5:36 am, g-man gregor...@gmail.com wrote: I am enhancing the Todo app by adding tags. I have retained the TD.scala snippet to manage the Todos on my page, and added a TG.scala snippet to handle tags on the same page, which works well for creating new and listing in both cases. Now I want to filter my Todos list by a Tag instance I select from my list, and therefore need to pass the id of the selected tag over from the TG snippet to the TD snippet, where it can be used as a filter argument for a find method. The problem is that scala says it cannot find snippet TD, whose method I am calling as TD.list from the TG.scala snippet. I have tried all kinds of explicit importing, but no luck. So, can a snippet call a snippet, or is that controlled only from the web page? --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Lift group. To post to this group, send email to liftweb@googlegroups.com To unsubscribe from this group, send email to liftweb+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/liftweb?hl=en -~--~~~~--~~--~--~---
[Lift] Re: can a Snippet call a Snippet?
Or you can use S.locateMappedSnippet ... but first try to see if nested snippet won't do the trick for you ... On Jun 30, 10:17 am, marius d. marius.dan...@gmail.com wrote: Can you paste some code? Essentially we support nested snippets so your snippet can simply return a markup containing another snippet and it will be invoked. If you really want to manually invoke a snippet from another snippet and if you are not using StatefulSnippets you can just instantiate the class and call your function and pass it the right NodeSeq. Br's, Marius On Jun 30, 5:36 am, g-man gregor...@gmail.com wrote: I am enhancing the Todo app by adding tags. I have retained the TD.scala snippet to manage the Todos on my page, and added a TG.scala snippet to handle tags on the same page, which works well for creating new and listing in both cases. Now I want to filter my Todos list by a Tag instance I select from my list, and therefore need to pass the id of the selected tag over from the TG snippet to the TD snippet, where it can be used as a filter argument for a find method. The problem is that scala says it cannot find snippet TD, whose method I am calling as TD.list from the TG.scala snippet. I have tried all kinds of explicit importing, but no luck. So, can a snippet call a snippet, or is that controlled only from the web page? --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Lift group. To post to this group, send email to liftweb@googlegroups.com To unsubscribe from this group, send email to liftweb+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/liftweb?hl=en -~--~~~~--~~--~--~---
[Lift] Re: can a Snippet call a Snippet?
I don't have such a clear picture of what you're trying to do. If you need to refer to the instance of a snippet that exists on the same page, it looks to me like that data is private in S.snippetForClass. Maybe you can nest the Tag tags in the ToDo snippet tag, have it instantiate a Tag instance, and call its xml processing functions directly, so that its SHtml setters etc. will refer to variables in the outer snippet's scope, i.e. the Tag instance it owns. - g-mangregor...@gmail.com wrote: I am enhancing the Todo app by adding tags. I have retained the TD.scala snippet to manage the Todos on my page, and added a TG.scala snippet to handle tags on the same page, which works well for creating new and listing in both cases. Now I want to filter my Todos list by a Tag instance I select from my list, and therefore need to pass the id of the selected tag over from the TG snippet to the TD snippet, where it can be used as a filter argument for a find method. The problem is that scala says it cannot find snippet TD, whose method I am calling as TD.list from the TG.scala snippet. I have tried all kinds of explicit importing, but no luck. So, can a snippet call a snippet, or is that controlled only from the web page? --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Lift group. To post to this group, send email to liftweb@googlegroups.com To unsubscribe from this group, send email to liftweb+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/liftweb?hl=en -~--~~~~--~~--~--~---
