QGIS » QGIS Application

Hello,

since at least QGIS 2.4 (and probably in earlier versions), the XML configuration of the edit widgets is stored twice in the project file (.qgs).
Edit widget configuration is stored under <edittypes> tag. There are two <edittypes> tags in the project file:

• the first is at the beginning of the layer definition (<maplayer> tag), after the <map-layer-style-manager> tag:
  

  <maplayer minimumScale="-4.65661e-10" maximumScale="1e+08" simplifyDrawingHints="0" minLabelScale="0" maxLabelScale="1e+08" simplifyDrawingTol="1" geometry="Point" simplifyMaxScale="1" type="vector" hasScaleBasedVisibilityFlag="0" simplifyLocal="1" scaleBasedLabelVisibilityFlag="0">
        <id>TEST_PATHS20151208112226506</id>
        <datasource>./DATA/TEST_PATHS.shp</datasource>
        <title></title>
        <abstract></abstract>
        <keywordList>
          <value></value>
        </keywordList>
        <layername>TEST_PATHS</layername>
        <srs>
          <spatialrefsys>
            <proj4>+proj=lcc +lat_1=46.8 +lat_0=46.8 +lon_0=0 +k_0=0.99987742 +x_0=600000 +y_0=200000 +a=6378249.2 +b=6356515 +towgs84=-168,-60,320,0,0,0,0 +pm=paris +units=m +no_defs</proj4>
            <srsid>2422</srsid>
            <srid>27562</srid>
            <authid>EPSG:27562</authid>
            <description>NTF (Paris) / Lambert Centre France</description>
            <projectionacronym>lcc</projectionacronym>
            <ellipsoidacronym></ellipsoidacronym>
            <geographicflag>false</geographicflag>
          </spatialrefsys>
        </srs>
        <provider encoding="System">ogr</provider>
        <previewExpression>COALESCE( "id", '&lt;NULL>' )</previewExpression>
        <vectorjoins/>
        <expressionfields/>
        <map-layer-style-manager current="">
          <map-layer-style name=""/>
        </map-layer-style-manager>
        <edittypes>
          <edittype widgetv2type="TextEdit" name="id">
            <widgetv2config IsMultiline="0" fieldEditable="1" UseHtml="0" labelOnTop="0"/>
          </edittype>
          <edittype widgetv2type="FileName" name="PATH">
            <widgetv2config fieldEditable="1" labelOnTop="0"/>
          </edittype>
        </edittypes>
  

• the second tag is at the end of the maplayer tag after the <conditionalstyles> tag:
  

  </editforminitcode>
        <featformsuppress>0</featformsuppress>
        <annotationform></annotationform>
        <editorlayout>generatedlayout</editorlayout>
        <excludeAttributesWMS/>
        <excludeAttributesWFS/>
        <attributeactions/>
        <conditionalstyles>
          <rowstyles/>
          <fieldstyles/>
        </conditionalstyles>
        <edittypes>
          <edittype widgetv2type="TextEdit" name="id">
            <widgetv2config IsMultiline="0" fieldEditable="1" UseHtml="0" labelOnTop="0"/>
          </edittype>
          <edittype widgetv2type="FileName" name="PATH">
            <widgetv2config fieldEditable="1" labelOnTop="0"/>
          </edittype>
        </edittypes>
      </maplayer>
  

For layers with a lot of attributes this can be problematic for the size of the project file.

It seems that QgsEditorWidgetRegistry::writeMapLayer is called twice (I haven't made any test, just read the code)...