for a longer time I have a problem with the attribute table. I create the polygons on the map, I fill up the table with attributes. Then, if I click "save", all the data from the table are being deleted and in all fields of the table a word "error" does appear. After the restart of the program, only that columns containing the number values are being kept. That ones which contain the words are deleted and the word "null" does appear in all the fields. Is somebody able to help me?
[GIS] Why does the attribute Table not maintain input data
attribute-tableerrorqgis
Related Solutions
Under Settings->Options->General (a bit down the panel) I have a dropdownbox "Behaviour of Attribute table" (or whatever it is in your language).
After switching that to "Show All Objects", I see them in the table. It looks like that overrides the checkbox in the attribute table itself.
You need to click the drop down menu list at the top right of the Attributes windows buttons and check the Field Names option. It looks like the Field Alias option is probably checked in this drop down menu based on the snapshot of your data.
Best Answer
Most likely the columns are defined as "numeric".
The problem is: QGIS lets you input any value into attribute table fields. If you input text into numeric fields, everything will look ok until you try to save the edits. Then it will fail to save text into the numeric fields.
There have been discussions about adding warnings to notify users if they input invalid values. They should be added in future versions.