Save as... fails to populate fields if layer has similar names only different by case

[qgib]

Author Name: Alexandre Neto (@SrNetoChan)
Original Redmine Issue: 13032
Affected QGIS version: master
Redmine category:vectors

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When using "save as..." in a layer, the tool fails to fill all fields values correctly if there are columns with similar names (being CAPS the only difference; I know it's a bad policy to give similar names to columns, but... it's out of my reach)

QGIS will consider that the columns have the same name, and therefore will create a new column with a suffix (fieldname_1). So far so good. But then fails to populate the new column with values.

I have marked that it causes corruption since the output will not be what the user expects.

I believe that issue #21103 is also related. Have something to do with the QgsVectorFileWriter.

To replicate the problem one can create a memory layer and add two columns named 'fieldname' and 'FieldName', and add some features. Notice that the feature form won't work well and will fill both fields at the same time. Edit them in the attribute table. Save. Use Save as... to make the layer permanent.

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Related issue(s): #21103 (relates)
Redmine related issue(s): 13027

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[qgib]

Author Name: Giovanni Manghi (@gioman)

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• fixed_version_id was configured as Future Release - High Priority
• priority_id was changed from Normal to High
• category_id was changed from Attribute table to Vectors

[qgib]

Author Name: Jürgen Fischer (@jef-n)

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• subject was changed from Save as... failed to populate fields if layer as similar names (with caps) to Save as... fails to populate fields if layer has similar names only different by case

[qgib]

Author Name: Jürgen Fischer (@jef-n)

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Fixed in changeset "8e2b791092ebc2be415c24c76bdc9d1b5a149961".

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• status_id was changed from Open to Closed