[DB Manager] Allow lowercase field names for homogenize PostGIS Import

PostGIS provider has an option to lowercase field names. This options is available for user in QGIS algorithm ImportIntoPostGIS and not in DB Mananger.

This commit fix it.

Author: rldhont

python/plugins/db_manager/db_plugins/plugin.py

@@ -550,6 +550,9 @@ def explicitSpatialIndex(self):
     def spatialIndexClause(self, src_table, src_column, dest_table, dest_table_column):
         return None
 
+    def hasLowercaseFieldNamesOption(self):
+        return False
+
 
 class Schema(DbItemObject):
 

python/plugins/db_manager/db_plugins/postgis/plugin.py

@@ -165,6 +165,9 @@ def runRefreshMaterializedViewSlot(self, item, action, parent):
 
         item.runRefreshMaterializedView()
 
+    def hasLowercaseFieldNamesOption(self):
+        return True
+
 
 class PGSchema(Schema):
 

python/plugins/db_manager/dlg_import_vector.py

@@ -106,6 +106,10 @@ def checkSupports(self):
         if not self.chkSpatialIndex.isEnabled():
             self.chkSpatialIndex.setChecked(False)
 
+        self.chkLowercaseFieldNames.setEnabled(self.db.hasLowercaseFieldNamesOption())
+        if not self.chkLowercaseFieldNames.isEnabled():
+            self.chkLowercaseFieldNames.setChecked(False)
+
     def populateLayers(self):
         self.cboInputLayer.clear()
         for index, layer in enumerate(iface.legendInterface().layers()):
@@ -300,13 +304,18 @@ def accept(self):
             else:
                 geom = None
 
+            options = {}
+            if self.chkLowercaseFieldNames.isEnabled() and self.chkLowercaseFieldNames.isChecked():
+                pk = pk.lower()
+                if geom:
+                    geom = geom.lower()
+                options['lowercaseFieldNames'] = True
+
             # get output params, update output URI
             self.outUri.setDataSource(schema, table, geom, "", pk)
             uri = self.outUri.uri(False)
 
             providerName = self.db.dbplugin().providerName()
-
-            options = {}
             if self.chkDropTable.isChecked():
                 options['overwrite'] = True
 

python/plugins/db_manager/ui/DlgImportVector.ui

@@ -253,7 +253,7 @@
         </property>
        </widget>
       </item>
-      <item row="7" column="0" colspan="2">
+      <item row="8" column="0" colspan="2">
        <widget class="QCheckBox" name="chkSpatialIndex">
         <property name="text">
          <string>Create spatial index</string>
@@ -267,6 +267,13 @@
         </property>
        </widget>
       </item>
+      <item row="7" column="0">
+       <widget class="QCheckBox" name="chkLowercaseFieldNames">
+        <property name="text">
+         <string>Convert field names to lowercase</string>
+        </property>
+       </widget>
+      </item>
      </layout>
     </widget>
    </item>