Just realized that there is another field, virtual one, referenced in the code. In case the problem doesn't reproduce without it, here is the definition (but I don't think that this would be necessary):
db.cart.count = Field.Virtual(lambda row:
db(db.cart_content.cart==row.cart.id).select(db.cart_content.quantity.count()).first()[db.cart_content.quantity.count()])
And here is the model (and data attached):
db.define_table('cart_content',
Field('cart','reference cart'),
Field('product','reference product'),
Field('formula','reference formula'),
Field('description','string',default=None),
Field('flavor','reference flavor'),
Field('quantity','integer',requires=[IS_NOT_EMPTY()],default=1),
Field('price','integer',represent=lambda x, row: '$' + str(x/100)),
Field('imported','boolean'),
auth.signature)
On Thursday, October 8, 2020 at 9:37:34 AM UTC-4 Vlad wrote:
> Sure, the sample data attached (are these 2 tables enough?), and the
> models are as follows:
>
> db.define_table('cart',
> Field('description','string',default='My Cart (%s)' %
> str((datetime.now().strftime("%m/%d/%Y %I:%M%p")))),
> auth.signature)
>
> db.define_table('cart_ownership',
> Field('description', 'string'),
> Field('boss','reference auth_user'),
> Field('cart', 'reference cart'),
> Field('status', 'string', requires=IS_IN_SET(['current','onhold'])),
> auth.signature)
>
>
> On Thursday, October 8, 2020 at 9:18:53 AM UTC-4 Jim S wrote:
>
>> any chance you have a model and a small sample-set of data you could
>> share that cause the inconsistencies to be shown? Just 3 records or so in
>> each table that can show the inconsistency?
>>
>>
>> On Thursday, October 8, 2020 at 7:38:48 AM UTC-5, Vlad wrote:
>>
>>> Yes, there is always a corresponding record in the second table (doesn't
>>> have to be, but I do clean up ownerless carts, so when I am testing things,
>>> the corresponding record is always there).
>>>
>>> Here is the complete creation of the grid (where GetCartsGridLink is the
>>> function that now has try/except clause to flip between row.id and
>>> row.cart.id):
>>>
>>> def show_carts():
>>>> query = db.cart
>>>> headers = {'cart.id':'ID', 'cart.description':'Name',
>>>> 'cart_ownership.boss':'Owner', 'cart_ownership.status':'Status',
>>>> 'cart.count':'Items'}
>>>> fields = [db.cart.id, db.cart.description, db.cart_ownership.boss,
>>>> db.cart_ownership.status, db.cart.count]
>>>> links = [dict(header='View', body=GetCartsGridLink)]
>>>>
>>>> grid = SQLFORM.grid(query,
>>>> editable=True,
>>>> details=True,
>>>> create=True,
>>>> links=links,
>>>> fields=fields,
>>>> headers=headers,
>>>> orderby=[~db.cart.created_on],
>>>> left = [db.cart_ownership.on(db.cart.id
>>>> ==db.cart_ownership.cart)],
>>>> formname='carts_grid',
>>>> field_id=db.cart.id,
>>>> )
>>>>
>>>> return grid
>>>
>>>
>>>
>>>
>>>
>>> On Wed, Oct 7, 2020 at 11:12 PM Jim Steil <[email protected]> wrote:
>>>
>> I will take a look tomorrow to see if I can code something up to
>>>> reproduce the error.
>>>>
>>>> Which tackle are you setting as the 'primary' table, by that I mean
>>>> what field are you specifying in the field_id parameter? And, is there
>>>> ALWAYS a matching record in the secondary table?
>>>>
>>>> Oh, just thought of another thing. How about specifying db.cart.id in
>>>> fields=[], and the also specifying it in hidden_fields=[]?
>>>>
>>>> Jim
>>>>
>>>>
>>>>
>>>> On Wed, Oct 7, 2020, 9:50 PM Eliezer (Vlad) Tseytkin <
>>>> [email protected]> wrote:
>>>>
>>> Jom, you said " I'm having trouble understanding why you need the
>>>>> try/except" - this is exactly the trouble I'm having too :)
>>>>>
>>>>> I do use the left join. So I should simply specify the table name -
>>>>> correct?
>>>>>
>>>>> Well, if I do - then the grid itself works fine, but once I click
>>>>> "view" or "edit" - it crashes. To fix that crash, I must specify
>>>>> try/except clause in the function used by the "links". WIthout that
>>>>> try/except the actions of view and edit don' work!
>>>>>
>>>>> That's exactly what I am saying - with the left join, the grid expects
>>>>> the table name, but the view/edit actions of this grid expect no table
>>>>> name
>>>>> and in fact crash when the table name is there.
>>>>>
>>>>> On Wed, Oct 7, 2020 at 10:38 PM Jim S <[email protected]> wrote:
>>>>>
>>>> I'm having trouble understanding why you need the try/except. To me it
>>>>>> seems like "if you specify a left" -> you need to use the table name.
>>>>>> "if
>>>>>> you don't specify a left" -> omit the table name
>>>>>>
>>>>>> Do you have an occasion where sometimes different rows in the same
>>>>>> grid require you to specify the field differently?
>>>>>>
>>>>>> -Jim
>>>>>>
>>>>>> On Wednesday, October 7, 2020 at 9:30:28 PM UTC-5, Vlad wrote:
>>>>>>>
>>>>>>> But shouldn't it be the same for the grid and for the record of the
>>>>>>> grid? The difference confuses me - having to specify the table should
>>>>>>> be
>>>>>>> consistent when I use the grid for all the transactions of the
>>>>>>> grid, including view/edit etc..
>>>>>>>
>>>>>>> In other words, having to specify the table is perfectly fine - but
>>>>>>> it should be consistent and I should as well specify the table for the
>>>>>>> view/edit action of the grid record. Different structures for the gird
>>>>>>> and
>>>>>>> fo the record of the grid seems inconsistent to me.It took me time to
>>>>>>> figure this out - now that I know how this works, I simply have the
>>>>>>> try/except to solve it - this makes practical sense, as it solves the
>>>>>>> problem, but it makes no logical sense. Do you know what I mean?
>>>>>>> Anybody
>>>>>>> who encounters such a situation will presumably be messed up and have
>>>>>>> to
>>>>>>> spend time figuring out what's going on.
>>>>>>>
>>>>>>> On Wed, Oct 7, 2020 at 10:22 PM Jim Steil <[email protected]> wrote:
>>>>>>>
>>>>>>>> I think that is a result of having a left join specified. With the
>>>>>>>> left join you now have to specify which table the field is in as well.
>>>>>>>>
>>>>>>>> Or, am I missing something?
>>>>>>>>
>>>>>>>> -Jim
>>>>>>>>
>>>>>>>> On Wed, Oct 7, 2020 at 9:13 PM Eliezer (Vlad) Tseytkin <
>>>>>>>> [email protected]> wrote:
>>>>>>>>
>>>>>>>>> Jim,
>>>>>>>>>
>>>>>>>>> Thank you for the suggestions.
>>>>>>>>>
>>>>>>>>> I do specify field_id (it wasn't there in the simplified code, but
>>>>>>>>> the complete code does have it).
>>>>>>>>>
>>>>>>>>> When I use a function, instead of the lambda, I indeed can have a
>>>>>>>>> solution, but at the same time it emphasizes that something is wrong:
>>>>>>>>>
>>>>>>>>> The links are now presented as such:
>>>>>>>>>
>>>>>>>>> links = [dict(header='View', body=GetCartsGridLink)]
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> And the GetCarrsGridLink function as follows:
>>>>>>>>>
>>>>>>>>> def GetCartsGridLink(row):
>>>>>>>>>>
>>>>>>>>>> id = None
>>>>>>>>>>
>>>>>>>>>> try:
>>>>>>>>>> id = row.cart.id # this works for the grid itself
>>>>>>>>>> except:
>>>>>>>>>> id = row.id # this works for the view/edit of a record of
>>>>>>>>>> the grid
>>>>>>>>>>
>>>>>>>>>> result = A(id,
>>>>>>>>>> _href=URL('manage', 'view_cart', args=id,
>>>>>>>>>> user_signature=True),
>>>>>>>>>> _target='blank')
>>>>>>>>>>
>>>>>>>>>> return result
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> It does solve the problem, because try/except takes care of it,
>>>>>>>>> setting up the id based on the context.
>>>>>>>>>
>>>>>>>>> I feel there is something wrong with the very necessity of having
>>>>>>>>> to use try/except here. Why would it use different structures in the
>>>>>>>>> grid
>>>>>>>>> itself vs. view/edit a row of the grid???
>>>>>>>>>
>>>>>>>>> The problem has been solved, but the mystery remains. I am still
>>>>>>>>> missing something about it...
>>>>>>>>>
>>>>>>>>> On Wed, Oct 7, 2020 at 4:48 PM Jim S <[email protected]> wrote:
>>>>>>>>>
>>>>>>>>>> I have a couple of ideas, but none are tested
>>>>>>>>>>
>>>>>>>>>> First, can you try adding the field_id parameter to your
>>>>>>>>>> SQLFORM.grid() call? I believe that tells this grid which is your
>>>>>>>>>> 'primary' table.
>>>>>>>>>>
>>>>>>>>>> Secondly (this is the way I typically handle it) - instead of
>>>>>>>>>> coding everything in a lambda, call a function to build your buttons
>>>>>>>>>> and
>>>>>>>>>> just pass it the id of the row. Then, in your function you can
>>>>>>>>>> retrieve
>>>>>>>>>> the entire row and get all the data you need even if it isn't
>>>>>>>>>> included in
>>>>>>>>>> the grid fields.
>>>>>>>>>>
>>>>>>>>>> Not sure that completely addresses your concern, but if you run
>>>>>>>>>> through those ideas it might help you onto a solution.
>>>>>>>>>>
>>>>>>>>>> -Jim
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> On Wednesday, October 7, 2020 at 1:44:41 PM UTC-5, Vlad wrote:
>>>>>>>>>>>
>>>>>>>>>>> Seems to me this is an inconsistency in the way how grid
>>>>>>>>>>> operates (which breaks it, as I show below, but, of course, most
>>>>>>>>>>> probably I
>>>>>>>>>>> am just missing something.)
>>>>>>>>>>>
>>>>>>>>>>> The following code crashes:
>>>>>>>>>>>
>>>>>>>>>>> query = db.cart
>>>>>>>>>>> fields = [db.cart.id]
>>>>>>>>>>> links = [dict(header='View', body=lambda row: str(*row.cart.id
>>>>>>>>>>> <http://row.cart.id>*))]
>>>>>>>>>>> grid = SQLFORM.grid(query, editable=True, details=True,
>>>>>>>>>>> links=links, fields=fields)
>>>>>>>>>>>
>>>>>>>>>>> This is because row.cart is undefined in the links. Instead, the
>>>>>>>>>>> links should be made as such:
>>>>>>>>>>>
>>>>>>>>>>> links = [dict(header='View', body=lambda row: str(*row.id
>>>>>>>>>>> <http://row.id>*))]
>>>>>>>>>>>
>>>>>>>>>>> Now this works.
>>>>>>>>>>>
>>>>>>>>>>> However, when I add more fields in the code, like this:
>>>>>>>>>>>
>>>>>>>>>>> fields = [db.cart.id, db.cart.description,
>>>>>>>>>>> db.cart_ownership.boss, db.cart_ownership.status, db.cart.count]
>>>>>>>>>>>
>>>>>>>>>>> Now in the links I can't use "row.id". It must be "row.cart.id"
>>>>>>>>>>>
>>>>>>>>>>> This by itself would be fine, I could just use *row.id
>>>>>>>>>>> <http://row.id>* or *row.card.id <http://row.card.id>*
>>>>>>>>>>> accordingly, depending on the fields used (though I would like to
>>>>>>>>>>> control
>>>>>>>>>>> this structure), but I am having the following problem further on:
>>>>>>>>>>>
>>>>>>>>>>> The grid described by the code
>>>>>>>>>>>
>>>>>>>>>>> query = db.cart
>>>>>>>>>>> fields = [db.cart.id, db.cart.description,
>>>>>>>>>>> db.cart_ownership.boss, db.cart_ownership.status, db.cart.count]
>>>>>>>>>>> links = [dict(header='View', body=lambda row: str(
>>>>>>>>>>> row.cart.id))]
>>>>>>>>>>> grid = SQLFORM.grid(query, editable=True, details=True,
>>>>>>>>>>> links=links, fields=fields)
>>>>>>>>>>>
>>>>>>>>>>> crashes when I try to view or edit a row of the grid. This is
>>>>>>>>>>> because the links takes row.cart.id in the grid itself, but
>>>>>>>>>>> expects row.id in edit- or view- actions (i.e. when editing or
>>>>>>>>>>> viewing a row). When viewing or editing a row, row.cart is
>>>>>>>>>>> undefined in the
>>>>>>>>>>> links, so row.cart.id crashes it (when "view" or "edit" buttons
>>>>>>>>>>> are clicked), while in the grid itself row.cart.id works just
>>>>>>>>>>> fine (and row.id would not work).
>>>>>>>>>>>
>>>>>>>>>>> What am I missing here? How do I control how this field should
>>>>>>>>>>> be expected in the links in the grid vs. in the view/edit a row of
>>>>>>>>>>> the
>>>>>>>>>>> grid?
>>>>>>>>>>>
>>>>>>>>>>> Here is still simplified but more complete code, in case I
>>>>>>>>>>> missed something important in a "shortcut" code above:
>>>>>>>>>>>
>>>>>>>>>>> query = db.cart
>>>>>>>>>>> fields = [db.cart.id, db.cart.description,
>>>>>>>>>>> db.cart_ownership.boss, db.cart_ownership.status, db.cart.count]
>>>>>>>>>>> links = [dict(header='View', body=lambda row: str(
>>>>>>>>>>> row.cart.id))]
>>>>>>>>>>> grid = SQLFORM.grid(query,
>>>>>>>>>>> editable=True,
>>>>>>>>>>> details=True,
>>>>>>>>>>> links=links,
>>>>>>>>>>> fields=fields,
>>>>>>>>>>> left = [db.cart_ownership.on(db.cart.id
>>>>>>>>>>> ==db.cart_ownership.cart)],
>>>>>>>>>>> field_id=db.cart.id,
>>>>>>>>>>> )
>>>>>>>>>>>
>>>>>>>>>>> --
>>>>>>>>>> Resources:
>>>>>>>>>> - http://web2py.com
>>>>>>>>>> - http://web2py.com/book (Documentation)
>>>>>>>>>> - http://github.com/web2py/web2py (Source code)
>>>>>>>>>> - https://code.google.com/p/web2py/issues/list (Report Issues)
>>>>>>>>>> ---
>>>>>>>>>> You received this message because you are subscribed to a topic
>>>>>>>>>> in the Google Groups "web2py-users" group.
>>>>>>>>>> To unsubscribe from this topic, visit
>>>>>>>>>> https://groups.google.com/d/topic/web2py/UGhYBMwmXec/unsubscribe.
>>>>>>>>>> To unsubscribe from this group and all its topics, send an email
>>>>>>>>>> to [email protected].
>>>>>>>>>> To view this discussion on the web visit
>>>>>>>>>> https://groups.google.com/d/msgid/web2py/257aa85d-41f2-4b2e-a59a-bd1980c83efco%40googlegroups.com
>>>>>>>>>>
>>>>>>>>>> <https://groups.google.com/d/msgid/web2py/257aa85d-41f2-4b2e-a59a-bd1980c83efco%40googlegroups.com?utm_medium=email&utm_source=footer>
>>>>>>>>>> .
>>>>>>>>>>
>>>>>>>>> --
>>>>>>>>> Resources:
>>>>>>>>> - http://web2py.com
>>>>>>>>> - http://web2py.com/book (Documentation)
>>>>>>>>> - http://github.com/web2py/web2py (Source code)
>>>>>>>>> - https://code.google.com/p/web2py/issues/list (Report Issues)
>>>>>>>>> ---
>>>>>>>>> You received this message because you are subscribed to a topic in
>>>>>>>>> the Google Groups "web2py-users" group.
>>>>>>>>> To unsubscribe from this topic, visit
>>>>>>>>> https://groups.google.com/d/topic/web2py/UGhYBMwmXec/unsubscribe.
>>>>>>>>> To unsubscribe from this group and all its topics, send an email
>>>>>>>>> to [email protected].
>>>>>>>>> To view this discussion on the web visit
>>>>>>>>> https://groups.google.com/d/msgid/web2py/CABZ%2BKCCVY37AMAFQ6FxgpJvX3X%3Dbr9gFBU68c74HpUJw3pEa%2BQ%40mail.gmail.com
>>>>>>>>>
>>>>>>>>> <https://groups.google.com/d/msgid/web2py/CABZ%2BKCCVY37AMAFQ6FxgpJvX3X%3Dbr9gFBU68c74HpUJw3pEa%2BQ%40mail.gmail.com?utm_medium=email&utm_source=footer>
>>>>>>>>> .
>>>>>>>>>
>>>>>>>> --
>>>>>>>> Resources:
>>>>>>>> - http://web2py.com
>>>>>>>> - http://web2py.com/book (Documentation)
>>>>>>>> - http://github.com/web2py/web2py (Source code)
>>>>>>>> - https://code.google.com/p/web2py/issues/list (Report Issues)
>>>>>>>> ---
>>>>>>>> You received this message because you are subscribed to a topic in
>>>>>>>> the Google Groups "web2py-users" group.
>>>>>>>> To unsubscribe from this topic, visit
>>>>>>>> https://groups.google.com/d/topic/web2py/UGhYBMwmXec/unsubscribe.
>>>>>>>> To unsubscribe from this group and all its topics, send an email to
>>>>>>>> [email protected].
>>>>>>>> To view this discussion on the web visit
>>>>>>>> https://groups.google.com/d/msgid/web2py/CAERBpoBS7skdN8q%3DzYwfA01WK-TKEHXkvq0iX%3Df4ghMRVbPzyw%40mail.gmail.com
>>>>>>>>
>>>>>>>> <https://groups.google.com/d/msgid/web2py/CAERBpoBS7skdN8q%3DzYwfA01WK-TKEHXkvq0iX%3Df4ghMRVbPzyw%40mail.gmail.com?utm_medium=email&utm_source=footer>
>>>>>>>> .
>>>>>>>>
>>>>>>> --
>>>>>> Resources:
>>>>>> - http://web2py.com
>>>>>> - http://web2py.com/book (Documentation)
>>>>>> - http://github.com/web2py/web2py (Source code)
>>>>>> - https://code.google.com/p/web2py/issues/list (Report Issues)
>>>>>> ---
>>>>>> You received this message because you are subscribed to a topic in
>>>>>> the Google Groups "web2py-users" group.
>>>>>> To unsubscribe from this topic, visit
>>>>>> https://groups.google.com/d/topic/web2py/UGhYBMwmXec/unsubscribe.
>>>>>> To unsubscribe from this group and all its topics, send an email to
>>>>>> [email protected].
>>>>>>
>>>>> To view this discussion on the web visit
>>>>>> https://groups.google.com/d/msgid/web2py/ffccc9ca-dc13-4efe-a6f3-d4140576053co%40googlegroups.com
>>>>>>
>>>>>> <https://groups.google.com/d/msgid/web2py/ffccc9ca-dc13-4efe-a6f3-d4140576053co%40googlegroups.com?utm_medium=email&utm_source=footer>
>>>>>> .
>>>>>>
>>>>> --
>>>>> Resources:
>>>>> - http://web2py.com
>>>>> - http://web2py.com/book (Documentation)
>>>>> - http://github.com/web2py/web2py (Source code)
>>>>> - https://code.google.com/p/web2py/issues/list (Report Issues)
>>>>> ---
>>>>> You received this message because you are subscribed to a topic in the
>>>>> Google Groups "web2py-users" group.
>>>>> To unsubscribe from this topic, visit
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>>>>>
>>>> To unsubscribe from this group and all its topics, send an email to
>>>>> [email protected].
>>>>>
>>>> To view this discussion on the web visit
>>>>> https://groups.google.com/d/msgid/web2py/CABZ%2BKCAAXA1tmt8gt3%2BDnJiwQFy28%3DLMag5YA9ra1rX0k52TSA%40mail.gmail.com
>>>>>
>>>>> <https://groups.google.com/d/msgid/web2py/CABZ%2BKCAAXA1tmt8gt3%2BDnJiwQFy28%3DLMag5YA9ra1rX0k52TSA%40mail.gmail.com?utm_medium=email&utm_source=footer>
>>>>> .
>>>>>
>>>> --
>>>> Resources:
>>>> - http://web2py.com
>>>> - http://web2py.com/book (Documentation)
>>>> - http://github.com/web2py/web2py (Source code)
>>>> - https://code.google.com/p/web2py/issues/list (Report Issues)
>>>> ---
>>>> You received this message because you are subscribed to a topic in the
>>>> Google Groups "web2py-users" group.
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>>>>
>>> To unsubscribe from this group and all its topics, send an email to
>>>> [email protected].
>>>>
>>> To view this discussion on the web visit
>>>> https://groups.google.com/d/msgid/web2py/CAERBpoCUMsMOm47LJOFgs5V%3DoWOx6LCngXCUNA0D9J10aWDQYQ%40mail.gmail.com
>>>>
>>>> <https://groups.google.com/d/msgid/web2py/CAERBpoCUMsMOm47LJOFgs5V%3DoWOx6LCngXCUNA0D9J10aWDQYQ%40mail.gmail.com?utm_medium=email&utm_source=footer>
>>>> .
>>>>
>>>
--
Resources:
- http://web2py.com
- http://web2py.com/book (Documentation)
- http://github.com/web2py/web2py (Source code)
- https://code.google.com/p/web2py/issues/list (Report Issues)
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db_cart_content.csv
Description: MS-Excel spreadsheet
