Ok thanks for your help Jim, i was getting confused - i introudced a bug
into my app but all working fine now i moved all the code to a fresh app
On Fri, Jul 21, 2017 at 3:51 PM, Jim Steil <ato.st...@gmail.com> wrote:
> I'm assuming you're talking about a primary key made up of multiple
> fields. Is that correct.
>
> I've never done that, but I don't see how it would change anything other
> than the 'left' setup.
>
> -Jim
>
> On Fri, Jul 21, 2017 at 5:54 AM, 'Matthew J Watts' via web2py-users <
> web2py@googlegroups.com> wrote:
>
>>
>> Hi, do you know if this is the same when i use primary keys of legacy
>> tables - doesn't seem to be working when i change my tables to primary key.
>> thanks
>>
>> On Wed, Jul 19, 2017 at 4:10 PM, Jim S <ato.st...@gmail.com> wrote:
>>
>>> We were all there once. Glad I was able to help. Part of the beauty of
>>> web2py is the community and the friendly help you can get on this group.
>>>
>>> -Jim
>>>
>>> On Wednesday, July 19, 2017 at 9:26:08 AM UTC-5, Matthew J Watts wrote:
>>>>
>>>> Great thanks Jim, that did it for me - it's hard being a beginner!!
>>>>
>>>> On Wed, Jul 19, 2017 at 2:09 PM, Jim S <ato....@gmail.com> wrote:
>>>>
>>>>> I'd start first with changing this:
>>>>>
>>>>> links = [lambda ids: A('Download data set',_href=URL("default","down
>>>>> load_dataset.csv",args=[ids.id]))]
>>>>>
>>>>> to this:
>>>>>
>>>>> links = [lambda ids: A('Download data set',_href=URL("default","down
>>>>> load_dataset.csv",args=[ids.MAIN.id <http://ids.id/>]))]
>>>>>
>>>>> When you add the LEFT join you then need to specify which table to get
>>>>> the field from.
>>>>>
>>>>> -Jim
>>>>>
>>>>>
>>>>> On Wednesday, July 19, 2017 at 6:44:45 AM UTC-5, Matthew J Watts wrote:
>>>>>>
>>>>>> Hi all
>>>>>>
>>>>>> I'm having some problems trying to achieve the following
>>>>>>
>>>>>> I have a grid with left joins which selects a subset of entries in my
>>>>>> database -(query between 3 tables)
>>>>>>
>>>>>> i then want to be able to set up links within the grid that sends
>>>>>> the id from each row (MAIN table) to a seperate function (another query
>>>>>> between many tables).
>>>>>>
>>>>>> I then want to trigger a download 'csv' file.
>>>>>>
>>>>>> So far, I have managed to get this working if I use one table in the
>>>>>> grid (no left joins), however when i set up left joins within the grid,i
>>>>>> get an 'AttributeError' message. Somehow, by setting up the left
>>>>>> joins, i loose the main id that i want to send to the seperate function
>>>>>> -
>>>>>> although i have set up 'field_id=db.MAIN.id <http://db.main.id/>'
>>>>>> in the grid
>>>>>>
>>>>>> Here's the code:
>>>>>>
>>>>>> *Controller*
>>>>>>
>>>>>> def vec_dyn_query():
>>>>>> links = [lambda ids: A('Download data
>>>>>> set',_href=URL("default","download_dataset.csv",args=[ids.id]))]
>>>>>> grid = SQLFORM.grid((db.MAIN),
>>>>>> field_id=db.MAIN.id,
>>>>>> left = [db.StudyLocation.on(db.MAIN.LocationID
>>>>>> == db.StudyLocation.id), db.TAXON.on(db.MAIN.TaxonID == db.TAXON.id
>>>>>> )],
>>>>>> links=links,
>>>>>> deletable=False, editable=False,
>>>>>> details=False, selectable=False, create=False, csv=False)
>>>>>> return locals()
>>>>>>
>>>>>> def download_dataset():
>>>>>> main_id = request.args(0,cast=int)
>>>>>> dataset = db(db.MAIN.id == request.args[0]).select()
>>>>>> return dict(dataset=dataset)
>>>>>>
>>>>>> *Views*
>>>>>>
>>>>>> {{
>>>>>> import cStringIO
>>>>>> stream = cStringIO.StringIO()
>>>>>> dataset.export_to_csv_file(stream)
>>>>>> response.headers['Content-Type'] = 'text/csv'
>>>>>> response.write(stream.getvalue(), escape=False)
>>>>>> }}
>>>>>>
>>>>>> Note - if i take away the 'left = [db.StudyLocation.on(db.MAIN.LocationID
>>>>>> == db.StudyLocation.id), db.TAXON.on(db.MAIN.TaxonID == db.TAXON.id)],'
>>>>>> Everything works fine
>>>>>>
>>>>>> Thanks for your help in advance
>>>>>>
>>>>>> Matt
>>>>>>
>>>>> --
>>>>> Resources:
>>>>> - http://web2py.com
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>>>>> - http://github.com/web2py/web2py (Source code)
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>>>>
>>>> --
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>>
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>> - http://github.com/web2py/web2py (Source code)
>> - https://code.google.com/p/web2py/issues/list (Report Issues)
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