def update_item():
"""Saves changes to an existing item.
:Returns: JSON with item ID or error message.
"""
user_id = login_session['user_id']
obj = request.get_json()
item = obj.pop('item')
item_id = item['id']
rating = int(obj.pop('rating', 0))
# Try to update the item using it's ID.
try:
app.q_MenuItem().filter_by(id=item_id).update(item)
app.db_session.flush()
except IntegrityError as e:
app.db_session.rollback()
return jsonify(error=e.orig.pgerror), 500
# Create or update rating if rating > 0.
if rating:
try:
# Try update.
rating_rec = app.q_Rating().filter_by(item_id=item_id,
user_id=user_id).one()
rating_rec.rating = rating
app.db_session.flush()
except NoResultFound:
# Create new rating record.
new_rating = MenuItemRating(rating=rating,
item_id=item_id,
user_id=user_id)
app.db_session.add(new_rating)
app.db_session.flush()
# Commit changes and return item ID for reference.
app.db_session.commit()
return jsonify(id=item_id)
def api_menu(name=None, r_id=None):
"""Returns the menu for a restaurant in JSON format.
Requires either the name or database ID number for a restaurant.
You can get a list of restaurant names and ID numbers by using
"/api/restaurants".
:arg string restaurant: The name of a restaurant to lookup.
:arg int restaurant_id: The database ID of a restaurant.
:returns: JSON with a 'menu' key and a list of menu items.
"""
if 'restaurant_id' in request.args:
r_id = request.args.get('restaurant_id')
if 'restaurant' in request.args:
name = request.args.get('restaurant')
if name:
# Retrieve menu items by the given restaurant name.
try:
recs = app.q_MenuItem().join(Restaurant).filter_by(name=name)
except NoResultFound:
return jsonify(error='Restaurant not found.'), 400
except MultipleResultsFound:
resp = jsonify(error='Multiple restaurants found. Use ID instead.')
return resp, 400
else:
# Retrieve menu items by the restaurant ID.
recs = app.q_MenuItem().filter_by(restaurant_id=r_id)
# Convert database objects to serializable dict objects.
recs_json = [each.sdict for each in recs]
return jsonify(menu=recs_json)
def api_menu(name=None, r_id=None):
"""Returns the menu for a restaurant in JSON format.
Requires either the name or database ID number for a restaurant.
You can get a list of restaurant names and ID numbers by using
"/api/restaurants".
:arg string restaurant: The name of a restaurant to lookup.
:arg int restaurant_id: The database ID of a restaurant.
:returns: JSON with a 'menu' key and a list of menu items.
"""
if "restaurant_id" in request.args:
r_id = request.args.get("restaurant_id")
if "restaurant" in request.args:
name = request.args.get("restaurant")
if name:
# Retrieve menu items by the given restaurant name.
try:
recs = app.q_MenuItem().join(Restaurant).filter_by(name=name)
except NoResultFound:
return jsonify(error="Restaurant not found."), 400
except MultipleResultsFound:
resp = jsonify(error="Multiple restaurants found. Use ID instead.")
return resp, 400
else:
# Retrieve menu items by the restaurant ID.
recs = app.q_MenuItem().filter_by(restaurant_id=r_id)
# Convert database objects to serializable dict objects.
recs_json = [each.sdict for each in recs]
return jsonify(menu=recs_json)
def update_item():
"""Saves changes to an existing item.
:Returns: JSON with item ID or error message.
"""
user_id = login_session["user_id"]
obj = request.get_json()
item = obj.pop("item")
item_id = item["id"]
rating = int(obj.pop("rating", 0))
# Try to update the item using it's ID.
try:
app.q_MenuItem().filter_by(id=item_id).update(item)
app.db_session.flush()
except IntegrityError as e:
app.db_session.rollback()
return jsonify(error=e.orig.pgerror), 500
# Create or update rating if rating > 0.
if rating:
try:
# Try update.
rating_rec = app.q_Rating().filter_by(item_id=item_id, user_id=user_id).one()
rating_rec.rating = rating
app.db_session.flush()
except NoResultFound:
# Create new rating record.
new_rating = MenuItemRating(rating=rating, item_id=item_id, user_id=user_id)
app.db_session.add(new_rating)
app.db_session.flush()
# Commit changes and return item ID for reference.
app.db_session.commit()
return jsonify(id=item_id)
def get_items():
"""Returns a list of all menu items for a restaurant.
Items are sorted by overall popularity: number of 'favorite' ratings down
to number of 'dislike' ratings. Each item also includes the user's rating
if a user is logged in.
"""
r_id = request.args['id']
recs = app.q_MenuItem().filter_by(restaurant_id=r_id)
# Convert to serializable and add logged-in user's ratings for each item.
user_id = login_session.get('user_id', None)
serializable_recs = []
for each_rec in recs:
srec = each_rec.sdict
for each_rating in each_rec.ratings:
if each_rating.user_id == user_id:
srec['rating'] = each_rating.rating
break
else:
srec['rating'] = 0
serializable_recs.append(srec)
# Sort menu items by their popularity and return list.
resp = sorted(serializable_recs,
key=lambda d:
(-d['favorite_count'], -d['good_count'], d['bad_count']))
return jsonify(items=resp)
def get_items():
"""Returns a list of all menu items for a restaurant.
Items are sorted by overall popularity: number of 'favorite' ratings down
to number of 'dislike' ratings. Each item also includes the user's rating
if a user is logged in.
"""
r_id = request.args["id"]
recs = app.q_MenuItem().filter_by(restaurant_id=r_id)
# Convert to serializable and add logged-in user's ratings for each item.
user_id = login_session.get("user_id", None)
serializable_recs = []
for each_rec in recs:
srec = each_rec.sdict
for each_rating in each_rec.ratings:
if each_rating.user_id == user_id:
srec["rating"] = each_rating.rating
break
else:
srec["rating"] = 0
serializable_recs.append(srec)
# Sort menu items by their popularity and return list.
resp = sorted(serializable_recs, key=lambda d: (-d["favorite_count"], -d["good_count"], d["bad_count"]))
return jsonify(items=resp)
def delete_item():
"""Deletes an item from the database.
:Returns: JSON object with status of 'ok' or HTML error message.
"""
if 'id' not in request.get_json():
return abort(400)
if not isinstance(request.get_json()['id'], int):
return abort(400)
try:
record = app.q_MenuItem().get(request.get_json()['id'])
app.db_session.delete(record)
app.db_session.commit()
return jsonify(status='ok')
except IntegrityError:
app.db_session.rollback()
return abort(500)
def delete_item():
"""Deletes an item from the database.
:Returns: JSON object with status of 'ok' or HTML error message.
"""
if "id" not in request.get_json():
return abort(400)
if not isinstance(request.get_json()["id"], int):
return abort(400)
try:
record = app.q_MenuItem().get(request.get_json()["id"])
app.db_session.delete(record)
app.db_session.commit()
return jsonify(status="ok")
except IntegrityError:
app.db_session.rollback()
return abort(500)
def item_form(restaurant_id):
"""Returns a **private** page for adding or editing a menu item.
Redirects to restaurant list if user is not logged in.
"""
item_id = request.args.get('id', None)
rating = request.args.get('rating', 0)
restaurant = app.q_Restaurant().get(restaurant_id)
context = {
'title': 'Edit Item' if item_id else 'New Item',
'restaurant': restaurant.sdict,
'item': None,
'rating': rating,
'username': login_session.get('username', ''),
'picture': login_session.get('picture', '')
}
if item_id is not None:
context['item'] = app.q_MenuItem().get(item_id).sdict
return render_template('form_item.html', **context)
def item_form(restaurant_id):
"""Returns a **private** page for adding or editing a menu item.
Redirects to restaurant list if user is not logged in.
"""
item_id = request.args.get('id', None)
rating = request.args.get('rating', 0)
restaurant = app.q_Restaurant().get(restaurant_id)
context = {
'title': 'Edit Item' if item_id else 'New Item',
'restaurant': restaurant.sdict,
'item': None,
'rating': rating,
'username': login_session.get('username', ''),
'picture': login_session.get('picture', '')
}
if item_id is not None:
context['item'] = app.q_MenuItem().get(item_id).sdict
return render_template('form_item.html', **context)
