Method and handler to change constraint dates

project.py

@@ -1061,6 +1061,37 @@ class Project(ModelSQL, ModelView):
         flash("Removed the assigned user from task")
         return redirect(request.referrer)
 
+    @login_required
+    def change_constraint_dates(self, task_id):
+        """Change the constraint dates
+        """
+        task = self.get_task(task_id)
+
+        data = {
+            'constraint_start_time': False,
+            'constraint_finish_time': False
+        }
+
+        constraint_start = request.form.get('constraint_start_time', None)
+        constraint_finish = request.form.get('constraint_finish_time', None)
+
+        if constraint_start:
+            data['constraint_start_time'] = datetime.strptime(
+                constraint_start, '%m/%d/%Y')
+        if constraint_finish:
+            data['constraint_finish_time'] = datetime.strptime(
+                constraint_finish, '%m/%d/%Y')
+
+        self.write(task.id, data)
+
+        if request.is_xhr:
+            return jsonify({
+                'success': True,
+            })
+
+        flash("The constraint dates have been changed for this task.")
+        return redirect(request.referrer)
+
 Project()
 
 

urls.xml

@@ -172,5 +172,12 @@
             <field name="methods">("POST",)</field>
             <field name="url_map" ref="nereid.default_url_map" />
         </record>
+        <record id="project_change_constraint_dates" model="nereid.url_rule">
+            <field name="rule">/&lt;language&gt;/task-&lt;int:task_id&gt;/change_constraint_dates</field>
+            <field name="endpoint">project.work.change_constraint_dates</field>
+            <field name="sequence" eval="60" />
+            <field name="methods">("POST",)</field>
+            <field name="url_map" ref="nereid.default_url_map" />
+        </record>
     </data>
 </tryton>