changes to linked resources functions

web/app/create.py

 from flask_login import login_required, current_user
 from .models import Resource
 from .models import Relationship
+from .resources import *
 from werkzeug.exceptions import abort
 from . import db
 
                 if request.form.getlist('linked_resources'):
                     for linked_resource in request.form.getlist('linked_resources'):
                         tool = Resource.query.filter_by(type='tool').filter_by(name=name).first()
-                        first_resource_id = tool.id
-                        second_resource_id = linked_resource
-                        new_relationship = Relationship(first_resource_id=first_resource_id, second_resource_id=second_resource_id)
-
-                        # add the new relationship to the database
-                        db.session.add(new_relationship)
-                        db.session.commit()
+                        add_linked_resource(tool.id, linked_resource)
 
         elif request.form.get('resource_type') == 'practice':
             type = 'practice'

web/app/practice.py

 @login_required
 def edit_practice(practice_id):
     practice = get_resource(practice_id)
+    resource_dropdown = Resource.query
+    links = get_linked_resources(practice_id)
 
     if request.method == 'POST':
         name = request.form['name']
         description = request.form['description']
+        linked_resources = request.form.getlist('linked_resources')
 
         if not name:
             flash('Name is required!')
             practice.name = name
             practice.description = description
             db.session.commit()
+            if linked_resources:
+                for linked_resource in request.form.getlist('linked_resources'):
+                    link = Resource.query.get(linked_resource)
+                    if link not in links:
+                        add_linked_resource(practice_id, linked_resource)
             return redirect(url_for('practice.get_practices'))
 
-    return render_template('edit.html', resource=practice)
+    return render_template('edit.html', resource=practice, resource_dropdown=resource_dropdown, links=links)
 
 # route for function to delete a single practice from the edit page
 @practice.route('/practices/<int:practice_id>/delete', methods=('POST',))

web/app/resources.py

     return resource
 
 # function to retrieve linked resources
-def get_linked_resources(resource_id):
-    relationships = Relationship.query.filter_by(first_resource_id=resource_id).all()
+def get_linked_resources(primary_id):
+    relationships = Relationship.query.filter_by(first_resource_id=primary_id).all()
+    links = []
     if relationships:
         links = []
         for relationship in relationships:
-             resource_id = relationship.second_resource_id
-             links.extend(Resource.query.filter_by(id=resource_id).all())
+             secondary_id = relationship.second_resource_id
+             links.extend(Resource.query.filter_by(id=secondary_id).all())
+        secondary_relationships = Relationship.query.filter_by(second_resource_id=primary_id).all()
+        if secondary_relationships:
+            for relationship in secondary_relationships:
+                primary_id = relationship.first_resource_id
+                links.extend(Resource.query.filter_by(id=primary_id).all())
         return links
     else:
-        relationships = Relationship.query.filter_by(second_resource_id=resource_id).all()
+        relationships = Relationship.query.filter_by(second_resource_id=primary_id).all()
         if relationships:
             links = []
             for relationship in relationships:
-                resource_id = relationship.first_resource_id
-                links.extend(Resource.query.filter_by(id=resource_id).all())
+                primary_id = relationship.first_resource_id
+                links.extend(Resource.query.filter_by(id=primary_id).all())
             return links
 
+# function to add a relationship to a linked resource
+def add_linked_resource(resource_id, linked_resource_id):
+    first_resource_id = resource_id
+    second_resource_id = linked_resource_id
+    new_relationship = Relationship(first_resource_id=first_resource_id, second_resource_id=second_resource_id)
+
+    # add the new relationship to the database
+    db.session.add(new_relationship)
+    db.session.commit()
+
 # function to delete a single resource
 def delete_resource(resource_id):
     deletion = Resource.query.get(resource_id)

web/app/templates/edit.html

           {% endfor %}
         </select>
     </div>
+
+    {% elif resource['type'] == 'practice' %}
+    <div class="mb-3 mt-3">
+        <label for="linked_practice_id">Linked resources</label>
+    </div>
+    <div class="mb-3 mt-3">
+        <select name="linked_resources" id="linked_resources" aria-label="Linked resources" class="selectpicker" data-live-search="true" multiple>
+          {% for resource_dropdown in resource_dropdown %}
+            {% if resource_dropdown['type'] != 'practice' %}
+              {% if resource_dropdown in links %}
+                <option value="{{ resource_dropdown['id'] }}" selected>{{ resource_dropdown['name'] }}</option>
+              {% else %}
+                <option value="{{ resource_dropdown['id'] }}">{{ resource_dropdown['name'] }}</option>
+              {% endif %}
+            {% endif %}
+          {% endfor %}
+        </select>
+    </div>
     {% endif %}
 
     <div class="mb-3 mt-3">

web/app/tool.py

         ingestFormats = request.form['ingestFormats']
         outputFormats = request.form['outputFormats']
         status = request.form['status']
-        linked_resource = request.form.getlist('linked_resources')
+        linked_resources = request.form.getlist('linked_resources')
 
         if not name:
             flash('Name is required!')
             tool.outputFormats = outputFormats
             tool.status = status
             db.session.commit()
-            if linked_resource:
-                for linked_resource in request.form.getlist('linked_resources'):
+            if linked_resources:
+                for linked_resource in linked_resources:
                     link = Resource.query.get(linked_resource)
                     if link not in links:
-                        first_resource_id = tool_id
-                        second_resource_id = linked_resource
-                        new_relationship = Relationship(first_resource_id=first_resource_id, second_resource_id=second_resource_id)
-
-                        # add the new relationship to the database
-                        db.session.add(new_relationship)
-                        db.session.commit()
+                        add_linked_resource(tool_id, linked_resource)
             return redirect(url_for('tool.get_tools'))
 
     return render_template('edit.html', resource=tool, resource_dropdown=resource_dropdown, links=links)