Implement selection-enabled table base class and update QuestionTable to inherit from it

generic/tables.py

@@ -12,6 +12,28 @@ from generic.models import CidUser, Examination, Supervisor, findMiddle
 
 from django.contrib.auth.models import User
 
+# Generic selection-enabled table base class.
+# Inherit from this class to automatically get a selection checkbox
+# column (input name="selection") and table attrs that client-side
+# scripts can use to find selectable tables.
+class SelectionTable(tables.Table):
+    # Provide a default selection checkbox column. Subclasses that wish to
+    # customise can override this attribute.
+    selection = tables.CheckBoxColumn(
+        accessor="pk",
+        orderable=False,
+        attrs={
+            'th': {'class': 'selection-col'},
+            'td': {'class': 'selection-col'},
+            'input': {'name': 'selection'},
+        },
+        verbose_name=''
+    )
+
+    class Meta:
+        # Defaults: add js-row-selectable class so client-side code can
+        # locate tables that support row selection.
+        attrs = {"class": "table js-row-selectable", "data-selection-name": "selection"}
 
 class SingleImageColumn(tables.Column):
     def render(self, value):