Python tools.DBconnect類代碼示例

def followers_list(email, type, params):
    DBconnect.exist(entity="Users", identifier="email", value=email)
    if type == "follower":
        where = "followee"
    if type == "followee":
        where = "follower"

    query = "SELECT " + type + " FROM Followers JOIN Users ON Users.email = Followers." + type + \
            " WHERE " + where + " = %s "

    if "since_id" in params:
        query += " AND Users.id >= " + str(params["since_id"])
    if "order" in params:
        query += " ORDER BY Users.name " + params["order"]
    else:
        query += " ORDER BY Users.name DESC "
    if "limit" in params:
        query += " LIMIT " + str(params["limit"])

    followers_ids_tuple = DBconnect.select_query(query=query, params=(email, ))

    f_list = []
    for id in followers_ids_tuple:
        id = id[0]
        f_list.append(users.details(email=id))

    return f_list

def threads_list(entity, identifier, related, params):
    if entity == "forum":
        DBconnect.exist(entity="Forums", identifier="short_name", value=identifier)
    if entity == "user":
        DBconnect.exist(entity="Users", identifier="email", value=identifier)
    query = "SELECT id FROM Threads WHERE " + entity + " = %s "
    parameters = [identifier]

    if "since" in params:
        query += " AND date >= %s"
        parameters.append(params["since"])
    if "order" in params:
        query += " ORDER BY date " + params["order"]
    else:
        query += " ORDER BY date DESC "
    if "limit" in params:
        query += " LIMIT " + str(params["limit"])

    thread_ids_tuple = DBconnect.select_query(query=query, params=parameters)
    thread_list = []

    for id in thread_ids_tuple:
        id = id[0]
        thread_list.append(details(id=id, related=related))

    return thread_list

def remove_restore(thread_id, status):
    DBconnect.exist(entity="Threads", identifier="id", value=thread_id)
    DBconnect.update_query("UPDATE Threads SET isDeleted = %s WHERE id = %s", (status, thread_id, ))

    response = {
        "thread": thread_id
    }
    return response

def open_close_thread(id, isClosed):
    DBconnect.exist(entity="Threads", identifier="id", value=id)
    DBconnect.update_query("UPDATE Threads SET isClosed = %s WHERE id = %s", (isClosed, id, ))

    response = {
        "thread": id
    }

    return response

def remove_follow(email1, email2):
    follows = DBconnect.select_query(
        'SELECT id FROM Followers WHERE follower = %s AND followee = %s', (email1, email2, )
    )

    if len(follows) != 0:
        DBconnect.update_query('DELETE FROM Followers WHERE follower = %s AND followee = %s', (email1, email2, ))
    else:
        raise Exception("No such following")

    return users.details(email1)

def details(id, related):
    thread = DBconnect.select_query(
        'select date, forum, id, isClosed, isDeleted, message, slug, title, user, dislikes, likes, points, posts '
        'FROM Threads WHERE id = %s', (id, )
    )
    if len(thread) == 0:
        raise Exception('No thread exists with id=' + str(id))
    thread = thread[0]
    thread = {
        'date': str(thread[0]),
        'forum': thread[1],
        'id': thread[2],
        'isClosed': bool(thread[3]),
        'isDeleted': bool(thread[4]),
        'message': thread[5],
        'slug': thread[6],
        'title': thread[7],
        'user': thread[8],
        'dislikes': thread[9],
        'likes': thread[10],
        'points': thread[11],
        'posts': thread[12],
    }

    if "user" in related:
        thread["user"] = users.details(thread["user"])
    if "forum" in related:
        thread["forum"] = forums.details(short_name=thread["forum"], related=[])

    return thread

def post_query(id):
    post = DBconnect.select_query('select date, dislikes, forum, id, isApproved, isDeleted, isEdited, '
                       'isHighlighted, isSpam, likes, message, parent, points, thread, user '
                       'FROM Posts WHERE id = %s', (id, ))
    if len(post) == 0:
        return None
    return post_formated(post)

def save_user(email, username, about, name, optional):
    isAnonymous = 0
    if "isAnonymous" in optional:
        isAnonymous = optional["isAnonymous"]
    try:
        user = DBconnect.select_query('select email, about, isAnonymous, id, name, username FROM Users WHERE email = %s',
                           (email, ))
        if len(user) == 0:
            DBconnect.update_query(
                'INSERT INTO Users (email, about, name, username, isAnonymous) VALUES (%s, %s, %s, %s, %s)',
                (email, about, name, username, isAnonymous, ))
        user = DBconnect.select_query('select email, about, isAnonymous, id, name, username FROM Users WHERE email = %s',
                           (email, ))
    except Exception as e:
        raise Exception(e.message)

    return user_format(user)

def list_users(short_name, optional):
    DBconnect.exist(entity="Forums", identifier="short_name", value=short_name)

    query = "SELECT distinct email FROM Users JOIN Posts ON Posts.user = Users.email " \
            " JOIN Forums on Forums.short_name = Posts.forum WHERE Posts.forum = %s "
    if "since_id" in optional:
        query += " AND Users.id >= " + str(optional["since_id"])
    if "order" in optional:
        query += " ORDER BY Users.id " + optional["order"]
    if "limit" in optional:
        query += " LIMIT " + str(optional["limit"])

    users_tuple = DBconnect.select_query(query, (short_name, ))
    list_u = []
    for user in users_tuple:
        user = user[0]
        list_u.append(users.details(user))
    return list_u

def details(email):
    user = DBconnect.select_query('select email, about, isAnonymous, id, name, username FROM Users WHERE email = %s', (email, ))
    user = user_format(user)
    if user is None:
        raise Exception("No user with email " + email)
    user["followers"] = followers(email, "follower")
    user["following"] = followers(email, "followee")
    user["subscriptions"] = user_subscriptions(email)
    return user

def select_query(query, params):
    try:
        con = DBconnect.connect()
        cursor = con.cursor()
        cursor.execute(query, params)
        result = cursor.fetchall()
        cursor.close()
        con.close()
    except db.Error as e:
        raise Exception(e.message)
    return result

def followers(email, type):
    where = "followee"
    if type == "follower":
        where = "followee"
    if type == "followee":
        where = "follower"
    f_list = DBconnect.select_query(
        "SELECT " + type + " FROM Followers JOIN Users ON Users.email = Followers." + type +
        " WHERE " + where + " = %s ", (email, )
    )
    return tuple2list(f_list)

def details(short_name, related):
    forum = DBconnect.select_query(
        'select id, name, short_name, user FROM Forums WHERE short_name = %s', (short_name, )
    )
    if len(forum) == 0:
        raise ("No forum with exists short_name=" + short_name)
    forum = forum_description(forum)

    if "user" in related:
        forum["user"] = users.details(forum["user"])
    return forum

def vote(vote_id, vote_type):
    DBconnect.exist(entity="Posts", identifier="id", value=vote_id)
    if vote_type == -1:
        DBconnect.update_query("UPDATE Posts SET dislikes=dislikes+1, points=points-1 where id = %s", (vote_id,))
    else:
        DBconnect.update_query("UPDATE Posts SET likes=likes+1, points=points+1  where id = %s", (vote_id,))
    return details(details_id=vote_id, related=[])

def update_query(query, params):
    try:
        con = DBconnect.connect()
        cursor = con.cursor()
        cursor.execute(query, params)
        con.commit()
        inserted_id = cursor.lastrowid

        cursor.close()
        con.close()
    except db.Error as e:
        raise Exception(e.message)
    return inserted_id