add option to reset the metadata cache

Author: paulmueller

dcoraid/dbmodel/db_api_cached.py

@@ -94,6 +94,11 @@ def get_users(self):
         """Return the list of DCOR users"""
         return self.ai.get_users()
 
+    def reset_cache(self):
+        self._mc_timestamp_path.unlink()
+        self._mc_version_path.unlink()
+        self._mc.reset()
+
     def search_dataset(self, query="", limit=100):
         """Search datasets via the CKAN API
 

dcoraid/gui/panel_maintenance/widget_maintenance.py

@@ -27,6 +27,7 @@ def __init__(self, *args, **kwargs):
 
         self.pushButton_cache.clicked.connect(self.on_clear_cache)
         self.pushButton_drafts.clicked.connect(self.on_remove_drafts)
+        self.pushButton_meta.clicked.connect(self.on_clear_meta)
 
     @staticmethod
     def find_main_window():
@@ -55,6 +56,18 @@ def on_clear_cache(self):
             msg.setWindowTitle("Nothing to do")
         msg.exec()
 
+    @QtCore.pyqtSlot()
+    def on_clear_meta(self):
+        """Clear local metadata cache"""
+        self.find_main_window().database.reset_cache()
+        QtWidgets.QMessageBox.information(
+            self,
+            "Metadata deleted",
+            "All metadata databases have been removed from local "
+            "storage. To continue working with DCOR-Aid, please select "
+            "'Update DB' in the 'Find Data' tab."
+        )
+
     @QtCore.pyqtSlot()
     def on_remove_drafts(self):
         with ShowWaitCursor():

dcoraid/gui/panel_maintenance/widget_maintenance.ui

@@ -24,6 +24,19 @@
      </property>
     </widget>
    </item>
+   <item row="0" column="1">
+    <spacer name="horizontalSpacer">
+     <property name="orientation">
+      <enum>Qt::Orientation::Horizontal</enum>
+     </property>
+     <property name="sizeHint" stdset="0">
+      <size>
+       <width>40</width>
+       <height>20</height>
+      </size>
+     </property>
+    </spacer>
+   </item>
    <item row="1" column="0">
     <widget class="QPushButton" name="pushButton_cache">
      <property name="toolTip">
@@ -34,7 +47,7 @@
      </property>
     </widget>
    </item>
-   <item row="2" column="0">
+   <item row="3" column="0">
     <spacer name="verticalSpacer">
      <property name="orientation">
       <enum>Qt::Orientation::Vertical</enum>
@@ -47,18 +60,12 @@
      </property>
     </spacer>
    </item>
-   <item row="0" column="1">
-    <spacer name="horizontalSpacer">
-     <property name="orientation">
-      <enum>Qt::Orientation::Horizontal</enum>
-     </property>
-     <property name="sizeHint" stdset="0">
-      <size>
-       <width>40</width>
-       <height>20</height>
-      </size>
+   <item row="2" column="0">
+    <widget class="QPushButton" name="pushButton_meta">
+     <property name="text">
+      <string>Clear local metadata cache</string>
      </property>
-    </spacer>
+    </widget>
    </item>
   </layout>
  </widget>