def save(self):
values = (self.email, self.name, self.__hashed_password)
if self.__id is None:
insert_query = """INSERT INTO Users(email, name, hashed_password) VALUES (%s, %s, %s) RETURNING id;"""
id_tuple = execute_query(get_connection(),
insert_query,
values,
fetch_one=True)
self.__id = id_tuple[0]
else:
update_query = """UPDATE Users
SET email = %s,
name = %s,
hashed_password = %s
WHERE id = %s;"""
values += (self.__id, )
execute_query(get_connection(), update_query, values)
def load(id=None, email=None, name=None):
select_query = """SELECT *
FROM Users"""
if id is None and email is None and name is None:
select_query += ";"
return execute_query(get_connection(),
select_query,
fetch_all=True)
elif id is not None or email is not None:
if id is not None:
select_query += f" WHERE id = {id};"
else:
select_query += f" WHERE email = '{email}';"
selected = execute_query(get_connection(),
select_query,
fetch_one=True)
user = User()
user.__id = selected[0]
user.email = selected[1]
user.name = selected[2]
user.__hashed_password = selected[3]
return user
elif name is not None:
select_query += f" WHERE name = '{name}';"
return execute_query(get_connection(),
select_query,
fetch_all=True)
def delete(self):
delete_query = """DELETE FROM Messages
WHERE id = %s;"""
execute_query(get_connection(), delete_query, (self.__id, ))
self.__id = None
def create_table():
create_table_query = """DROP TABLE IF EXISTS Users;
CREATE TABLE Users
(
id SERIAL PRIMARY KEY,
email VARCHAR(255) UNIQUE,
name VARCHAR(255),
hashed_password VARCHAR(80)
);"""
execute_query(get_connection(), create_table_query)
def create_table():
create_table_query = """DROP TABLE IF EXISTS Messages;
CREATE TABLE Messages
(
id SERIAL PRIMARY KEY,
from_id INT REFERENCES Users(id),
to_id INT REFERENCES Users(id),
text TEXT,
creation_date TIMESTAMP
);"""
execute_query(get_connection(), create_table_query)
def save(self):
values = (self.from_id, self.to_id, self.text, self.creation_date)
if self.__id is None:
insert_query = """INSERT INTO Messages(from_id, to_id, text, creation_date) VALUES
(%s, %s, %s, %s)
RETURNING id;"""
id_tuple = execute_query(get_connection(),
insert_query,
values,
fetch_one=True)
self.__id = id_tuple[0]
def load(id=None, from_id=None, to_id=None, text=None, creation_date=None):
def load_selected(key, value, query, is_where=False):
if 'id' in key:
if not is_where:
query += f" WHERE {key} = {value}"
else:
query += f" AND {key} = {value}"
query += ";"
return query
else:
if not is_where:
query += f" WHERE {key}::text LIKE '%{value}%';"
else:
query += f" WHERE {key}::text LIKE '%{value}%';"
query += ";"
return query
keys = ['id', 'from_id', 'to_id', 'text', 'creation_date']
values = [id, from_id, to_id, text, creation_date]
load_dict = dict(zip(keys, values))
select_query = """SELECT *
FROM Messages"""
none_counter = 0
for v in values:
if v is None:
none_counter += 1
if none_counter == 5:
select_query += ";"
return execute_query(get_connection(),
select_query,
fetch_all=True)
elif none_counter <= 4:
is_where = False
for k in load_dict:
if k == 'id' and load_dict[k] is not None:
select_query = load_selected(k, load_dict[k], select_query)
selected = execute_query(get_connection(),
select_query,
fetch_one=True)
message = Message()
message.__id = selected[0]
message.from_id = selected[1]
message.to_id = selected[2]
message.text = selected[3]
message.creation_date = selected[4]
return message
elif k != 'id' and load_dict[k] is not None:
if not is_where:
select_query = load_selected(k, load_dict[k],
select_query)
is_where = True
else:
select_query = load_selected(k,
load_dict[k],
select_query,
is_where=True)
return execute_query(get_connection(), select_query, fetch_all=True)