def update(new_post, categories):
"""Update post.
Arguments:
new_post -- Posts object
categories - list of categories
"""
session = DBSession()
# get data
post = session.query(Posts).filter(Posts.id == new_post.id,
Posts.is_deleted == False).one()
# update data
if new_post.header is not None:
post.header = new_post.header
if new_post.content is not None:
post.content = new_post.content
if categories:
post.categories.clear()
for c in categories:
category = session.query(Categories).get(c)
post.categories.append(category)
post.modification_date = datetime.now().replace(
microsecond=0).isoformat(' ')
session.commit()
session.close()
def get_custom_by_category(category_id, quantity, from_id=None, newer=False):
"""Return list of posts by custom rules in the selected category.
Arguments:
category_id -- id of the category
quantity -- quantity of posts
from_id -- start from this post
newer --
if False - returns older posts
if True - return newer posts
"""
session = DBSession()
# start from last post if no from_id passed
if from_id is None:
posts = session.query(Posts).join(Posts.categories). \
filter(Categories.id == category_id, Posts.is_deleted == False). \
order_by(Posts.id.desc()). \
limit(int(quantity)).all()
# start from custom post
else:
# get older posts
if not newer:
posts = session.query(Posts).join(Posts.categories). \
filter(Categories.id == category_id,
Posts.id <= int(from_id),
Posts.is_deleted == False). \
order_by(Posts.id.desc()). \
limit(int(quantity)). \
all()
# get newer posts
else:
posts = session.query(Posts).join(Posts.categories). \
filter(Categories.id == category_id,
Posts.id >= int(from_id),
Posts.is_deleted == False). \
order_by(Posts.id). \
limit(int(quantity)). \
from_self(). \
order_by(Posts.id.desc()). \
all()
session.close()
return posts
def get_first_last():
"""Return id of the first and the last post
Returns dictionary, keys : first_id, last_id.
"""
session = DBSession()
first_id = session.query(Posts).filter(Posts.is_deleted == False). \
order_by(Posts.id).first().id
last_id = session.query(Posts).filter(Posts.is_deleted == False). \
order_by(Posts.id.desc()).first().id
session.close()
return {'first_id': first_id, 'last_id': last_id}
def get_all():
"""Return list of all categories"""
session = DBSession()
result = session.query(Categories).all()
session.close()
return result
def get(id):
"""Return category by id"""
session = DBSession()
category = session.query(Categories).get(id)
session.close()
return category
def get(id):
"""Get user by id"""
session = DBSession()
user = session.query(Users).get(id)
session.close()
return user
def get_author(id):
"""Return author id by post's id."""
session = DBSession()
post = session.query(Posts).filter(Posts.id == id). \
options(load_only('author_id')).one()
session.close()
return post.author_id
def get(id):
"""Return post by it's id."""
session = DBSession()
post = session.query(Posts).filter(Posts.id == id,
Posts.is_deleted == False).one()
session.close()
return post
def get_all():
"""Return list of all posts."""
session = DBSession()
posts = session.query(Posts).filter(Posts.is_deleted == False). \
order_by(Posts.id.desc()).all()
session.close()
return posts
def get_all_by_category(id):
"""Return list of all posts in the category by it's id."""
session = DBSession()
posts = session.query(Posts).join(Posts.categories). \
filter(Categories.id == id, Posts.is_deleted == False). \
order_by(Posts.id.desc()).all()
session.close()
return posts
def delete(id):
"""Delete post by id"""
session = DBSession()
post = session.query(Posts).filter(Posts.id == id,
Posts.is_deleted == False).one()
# actually just set is_deleted flag to True
post.is_deleted = True
post.deletion_date = datetime.now().replace(microsecond=0).isoformat(' ')
session.commit()
session.close()
def restore(post_id):
"""Restore deleted post by id"""
session = DBSession()
post = session.query(Posts).filter(Posts.id == post_id,
Posts.is_deleted == True).one()
post.modification_date = datetime.now().replace(
microsecond=0).isoformat(' ')
post.deletion_date = None
post.is_deleted = False
session.commit()
session.close()
def validate(username, password):
"""Validate user.
If successfull - returns user's id, else - None.
"""
session = DBSession()
user = session.query(Users).filter(Users.username == username).first()
session.close()
if user is not None and user.password == password:
return user.id
else:
return None
def add(post, categories):
"""Add new post and return it's id.
Arguments:
post - Posts object
categories - list of categories id
"""
session = DBSession()
session.add(post)
# add categories to the post
for id in categories:
category = session.query(Categories).get(id)
post.categories.append(category)
id = post.id
session.commit()
session.close()
return id