Bug report #16153
Default values for fields include their types.
|Affected QGIS version:||2.18.0||Regression?:||No|
|Operating System:||Easy fix?:||No|
|Pull Request or Patch supplied:||No||Resolution:||end of life|
|Crashes QGIS or corrupts data:||No||Copied to github as #:||24065|
We found an unexpected behaviour for fields with default values in QGIS when a PostGIS layer is used.
Instead of simply returning the default value of a field when digitizing a new feature, it also includes its type. In the screenshot below it can be seen that the default value is ‘value2’::test_schema.enum_type instead of value2. See default-vale-text.png
The problem we have is that if we use an enum type for a field in a table with a default value, QGIS is not able to show the default value. See fields-configurationpng and default-value-in-combobox.png
In order to solve that, we developed a custom QgsEditorWidgetWrapper following the instructions located in http://blog.vitu.ch/10142013-1847/write-your-own-qgis-form-elements
(currently unavailable, you can check it at http://web.archive.org/web/20160806070011/http://blog.vitu.ch/10142013-1847/write-your-own-qgis-form-elements)
We found that the method self.defaultValue() of a QgsEditorWidgetWrapper object returns the default value as explained above. We had to filter the returned value in order to obtain the correct one and allow the QComboBox to display the default value.
We think that is better for a normal user that QGIS returns the default value as is, especially because you can retrieve the type using other methods if needed. This issue is closely related to #13295
- Extra info to replicate****
Database setup used for this issue:
CREATE EXTENSION IF NOT EXISTS postgis;
CREATE SCHEMA test_schema;
CREATE TYPE test_schema.enum_type AS ENUM ('value1', 'value2', 'value3');
CREATE TABLE test_schema.test_default_value(
id int primary key,
value test_schema.enum_type default 'value2',
geom geometry(Point, 32628) NOT NULL
#3 Updated by Giovanni Manghi 11 months ago
- Resolution set to end of life
- Status changed from Open to Closed
End of life notice: QGIS 2.18 LTR
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