[Qgis-developer] Open custom form from another form

Denis Rouzaud denis.rouzaud at gmail.com
Tue Jan 14 08:01:03 PST 2014

Hi Luca,

The best way to do this, is to set your personnally designed UI file in 
the layer properties->field properties->attribute editor layout->provide 
ui file

Then, you want to call qgis method to show a feature form:

And you would need some processing to show it:
1. get feature id from the selected line
2. fetch the feature of the main layer
3. get the foreign key from one of its fields
4. fetch the corresponding feature
4. show the feature form with it

Anyway, if I understand properly, you're trying to do something which 
has been recently added to QGIS (it's in the master version), it's 1:n 
See here for more info:



On 14. 01. 14 16:50, Luca Lanteri wrote:
> Hi to all,
> I need a help from a python guru. I'm trying to move my first steps 
> with pyqgis.
> I've got two qgis layer with a 1 to many relation. I create a custom 
> form for the parent layer with a QTableWidget that contain the primary 
> key of the child layer. Now I want to open another custom form with 
> the data of the child record selected into the QTableWidget. I try to 
> look up into the QGIS API Documentation but I'didn't find the solution 
> to my problem.
> Now I just can open form with this code, connected with a button:
>     path = os.path.dirname( os.path.abspath( __file__ ) )
>     uifile = os.path.join(path , my_form.ui')
>     window = uic.loadUi(uifile)
>     window.exec_()
> how can I connect my form with the right data ?
> Can I use some method to select the right layer/record and open it in 
> the form ?
> Thanks in advance for any tips
> Luca
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> Qgis-developer at lists.osgeo.org
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