Relation reference widget not filtering available values when "Chain filters" option is activated

[qgib]

Author Name: Paul Blottiere (Paul Blottiere)
Original Redmine Issue: 16903
Affected QGIS version: master
Redmine category:edit_widget
Assignee: Paul Blottiere

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When the "Chain filter" option is activated, filtering combobox should only propose values for which a feature well exists.

However, it's not the case because previous filtering values are not taking into account. Thus, sometime, users are able to select values whereas there's no existing feature(s) corresponding to the filter.

See the initial description/discussion here : qwat/QWAT#186

[qgib]

Author Name: Paul Blottiere (Paul Blottiere)

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• subject was changed from Reference value widget not filtering available values when "Chain filters" option is activated to Relation reference widget not filtering available values when "Chain filters" option is activated

[qgib]

Author Name: Paul Blottiere (Paul Blottiere)

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Applied in changeset 8642e88.

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• done_ratio was changed from 0 to 100
• status_id was changed from Open to Closed