[xwiki-users] Display Objects help

[Ashtar Communications]

Hi,

At the outset - I admit to being a complete and total newbie at this.
Apologize for asking what are probably dumb questions - and likely to be
lots more than one. Any help people would be willing to give me would be
much appreciated.

I have been through all the tutorials, the API JavaDoc, and as many examples
of code as I could find, but I still can't seem to find anything that looks
directly applicable or works when I try to adapt it.

What I'm ultimately trying to do seems pretty straightforward. I would like
to have a set of pages which each contain structured data that can be
modified, added, or deleted one object at a time, and which display in
reverse chronological order. I would like each of those objects to be
displayed with specific HTML formatting. Eventually, I will also need to be
able to interact with those objects using the REST API. My current
understanding of the process I need to use to get started is this:

1) Create a new Class (We'll call it Entry) with specific properties
2) Create the Class Sheet and Template. The Template includes a link to the
Class Sheet for displaying instances of the class.
3) Edit the Class Sheet to get the attached objects to display properly
4) Create a new page from the Template, add several instances of the class
to it - they should then display on the new page.

First two steps are easy - but the first place that I am hung up is figuring
out how to get the Class Sheet to display multiple objects of the same class
attached to the same page.

I have a page with 3 objects of the Entry class attached (with different
info in the properties). Ultimately the info and formatting will need to be
more complex, but I can't even get the basics to work - this is what I have
tried so far:

START CODE
#foreach($entry in $doc.getObjects(XWiki.EntryClass))
  #foreach($prop in $entry.properties)
: $doc.display($prop.getName())
  #end
#end
END CODE***

The problem is that this code displays the info for the first object three
times, instead of the unique properties for each class. The fact that it
displays three times seems to indicate that the loop is correctly going
through each object in the document - but it is obviously not incrementing
the properties to the next $entry. Sure it's a simple syntax error, but
don't know what it is.

I also can't tell from the JavaDoc enough about how to use .display() or the
properties of a vector to know how to do basic things like display the
number of objects or the name of each one. Can't figure out how to interact
with objects very well, basically.

Side question - Should I be using one object per page and then including
pages instead of having multiple objects on one page? I have worked my way
through the TOC demo, and it seems that each TOC entry is saved on a
separate page - and the livetable macro is then used on the display page
to populate the table with all the entries.

Thank you in advance,

Aaron
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Re: [xwiki-users] Display Objects help

[Guillaume Lerouge]

Hi Aaron,

the bulletin board application does this on topic pages:
http://extensions.xwiki.org/xwiki/bin/view/Extension/Bulletin+Board+Application#HTopics

You can download it, install it locally and look at its code to see how it's
done.

In any case, you can definitely have several objects on the page. You can
also edit your code as such in order to get each individual object and then
act on it:

#foreach($entry in $doc.getObjects(XWiki.EntryClass))
  #set($entryObj = $doc.getObject($entry))
  $entry.prop1
  $entry.prop2
#end

Hope this helps,

Guillaume

On Tue, Jun 28, 2011 at 23:59, Ashtar Communications 
ashtarcommunicati...@gmail.com wrote:

 Hi,

 At the outset - I admit to being a complete and total newbie at this.
 Apologize for asking what are probably dumb questions - and likely to be
 lots more than one. Any help people would be willing to give me would be
 much appreciated.

 I have been through all the tutorials, the API JavaDoc, and as many
 examples
 of code as I could find, but I still can't seem to find anything that looks
 directly applicable or works when I try to adapt it.

 What I'm ultimately trying to do seems pretty straightforward. I would like
 to have a set of pages which each contain structured data that can be
 modified, added, or deleted one object at a time, and which display in
 reverse chronological order. I would like each of those objects to be
 displayed with specific HTML formatting. Eventually, I will also need to be
 able to interact with those objects using the REST API. My current
 understanding of the process I need to use to get started is this:

 1) Create a new Class (We'll call it Entry) with specific properties
 2) Create the Class Sheet and Template. The Template includes a link to the
 Class Sheet for displaying instances of the class.
 3) Edit the Class Sheet to get the attached objects to display properly
 4) Create a new page from the Template, add several instances of the class
 to it - they should then display on the new page.

 First two steps are easy - but the first place that I am hung up is
 figuring
 out how to get the Class Sheet to display multiple objects of the same
 class
 attached to the same page.

 I have a page with 3 objects of the Entry class attached (with different
 info in the properties). Ultimately the info and formatting will need to be
 more complex, but I can't even get the basics to work - this is what I have
 tried so far:

 START CODE
 #foreach($entry in $doc.getObjects(XWiki.EntryClass))
  #foreach($prop in $entry.properties)
: $doc.display($prop.getName())
  #end
 #end
 END CODE***

 The problem is that this code displays the info for the first object three
 times, instead of the unique properties for each class. The fact that it
 displays three times seems to indicate that the loop is correctly going
 through each object in the document - but it is obviously not incrementing
 the properties to the next $entry. Sure it's a simple syntax error, but
 don't know what it is.

 I also can't tell from the JavaDoc enough about how to use .display() or
 the
 properties of a vector to know how to do basic things like display the
 number of objects or the name of each one. Can't figure out how to interact
 with objects very well, basically.

 Side question - Should I be using one object per page and then including
 pages instead of having multiple objects on one page? I have worked my way
 through the TOC demo, and it seems that each TOC entry is saved on a
 separate page - and the livetable macro is then used on the display page
 to populate the table with all the entries.

 Thank you in advance,

 Aaron

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Re: [xwiki-users] Display Objects help

[Ashtar Communications]

Guillaume,

Thanks for the lead and the quick response. The BB application does indeed
look like it does something very close to what I need to replicate. I will
spend some time digging through the code until I understand it and will post
again if I can't figure it out. Looks very promising.

I have already discovered that the main thing I was missing in my previous
code were the getProperties() and getProperty() methods.

This code solved my initial problem:
#foreach($entry in $doc.getObjects('XWiki.EntryClass'))
  #foreach($prop in $entry.getProperties())
$entry.getProperty($prop.getName()).getValue()
  #end
#end

Thanks again,
aaron

On Tue, Jun 28, 2011 at 3:59 PM, Guillaume Lerouge guilla...@xwiki.comwrote:

 Hi Aaron,

 the bulletin board application does this on topic pages:

 http://extensions.xwiki.org/xwiki/bin/view/Extension/Bulletin+Board+Application#HTopics

 You can download it, install it locally and look at its code to see how
 it's
 done.

 In any case, you can definitely have several objects on the page. You can
 also edit your code as such in order to get each individual object and then
 act on it:

 #foreach($entry in $doc.getObjects(XWiki.EntryClass))
   #set($entryObj = $doc.getObject($entry))
  $entry.prop1
  $entry.prop2
 #end

 Hope this helps,

 Guillaume

 On Tue, Jun 28, 2011 at 23:59, Ashtar Communications 
 ashtarcommunicati...@gmail.com wrote:

  Hi,
 
  At the outset - I admit to being a complete and total newbie at this.
  Apologize for asking what are probably dumb questions - and likely to be
  lots more than one. Any help people would be willing to give me would be
  much appreciated.
 
  I have been through all the tutorials, the API JavaDoc, and as many
  examples
  of code as I could find, but I still can't seem to find anything that
 looks
  directly applicable or works when I try to adapt it.
 
  What I'm ultimately trying to do seems pretty straightforward. I would
 like
  to have a set of pages which each contain structured data that can be
  modified, added, or deleted one object at a time, and which display in
  reverse chronological order. I would like each of those objects to be
  displayed with specific HTML formatting. Eventually, I will also need to
 be
  able to interact with those objects using the REST API. My current
  understanding of the process I need to use to get started is this:
 
  1) Create a new Class (We'll call it Entry) with specific properties
  2) Create the Class Sheet and Template. The Template includes a link to
 the
  Class Sheet for displaying instances of the class.
  3) Edit the Class Sheet to get the attached objects to display properly
  4) Create a new page from the Template, add several instances of the
 class
  to it - they should then display on the new page.
 
  First two steps are easy - but the first place that I am hung up is
  figuring
  out how to get the Class Sheet to display multiple objects of the same
  class
  attached to the same page.
 
  I have a page with 3 objects of the Entry class attached (with different
  info in the properties). Ultimately the info and formatting will need to
 be
  more complex, but I can't even get the basics to work - this is what I
 have
  tried so far:
 
  START CODE
  #foreach($entry in $doc.getObjects(XWiki.EntryClass))
   #foreach($prop in $entry.properties)
 : $doc.display($prop.getName())
   #end
  #end
  END CODE***
 
  The problem is that this code displays the info for the first object
 three
  times, instead of the unique properties for each class. The fact that it
  displays three times seems to indicate that the loop is correctly going
  through each object in the document - but it is obviously not
 incrementing
  the properties to the next $entry. Sure it's a simple syntax error, but
  don't know what it is.
 
  I also can't tell from the JavaDoc enough about how to use .display() or
  the
  properties of a vector to know how to do basic things like display the
  number of objects or the name of each one. Can't figure out how to
 interact
  with objects very well, basically.
 
  Side question - Should I be using one object per page and then including
  pages instead of having multiple objects on one page? I have worked my
 way
  through the TOC demo, and it seems that each TOC entry is saved on a
  separate page - and the livetable macro is then used on the display
 page
  to populate the table with all the entries.
 
  Thank you in advance,
 
  Aaron
 
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 http://lists.xwiki.org/mailman/listinfo/users

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