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# -*- coding: utf-8 -*-
# SQLite library
import sqlite3
class SQLiteR():
def __init__(self, database = None):
self.db_name = database
if (self.db_name == None):
self.db_name = ':memory:'
self.db_conn = None
self.db_cursor = None
def record_factory(self, cursor, row):
record = dict()
for index, column in enumerate(cursor.description):
record[column[0]] = row[index]
return record
def connect(self, isolation_level = None):
try:
self.db_conn = sqlite3.connect(self.db_name)
self.db_conn.row_factory = self.record_factory
self.db_cursor = self.db_conn.cursor()
except:
return False
self.db_conn.isolation_level = isolation_level
return True
def disconnect(self):
try:
self.db_nonn.close()
except:
return False
return True
def execute(self, query, parameters = []):
try:
return self.db_cursor.execute(query, parameters)
except:
return False
def fetch_row(self):
return self.db_cursor.fetchone()
def fetch_rows(self):
return self.db_cursor.fetchall()
def execute_get_rows(self, query, parameters = []):
if (self.execute(query, parameters)):
return self.fetch_rows()
else:
return False
def execute_get_row(self, query, parameters = []):
query = "%s LIMIT 1" % query
if (self.execute(query, parameters)):
return self.fetch_row()
else:
return False
def execute_get_value(self, query, parameters = []):
row = self.execute_get_row(query, parameters)
if (row):
return row[0]
else:
return row
def create_table(self, table, structure, primary_key = None):
columns = list()
for row in structure:
key, value = row.items()[0]
sql_type = "VARCHAR(255)"
sql_key = ''
if (key == primary_key):
sql_key = 'PRIMARY KEY'
type_r = value.split(':', 1)
type_n = type_r[0]
if (type_n == 'integer'):
sql_type = 'INTEGER'
elif (type_n == 'string'):
try:
sql_type = "VARCHAR(%s)" % type_r[1]
except IndexError, e:
sql_type = "VARCHAR(255)"
columns.append('"%s" %s %s' % (key, sql_type, sql_key))
query = 'CREATE TABLE "%s" (%s)' % (table, ', '.join(columns))
return self.execute(query)
def save(self, table, row):
keys = row.keys()
query = 'INSERT OR REPLACE INTO "%s" (%s) VALUES (:%s)' % (table, ', '.join(keys), ', :'.join(keys))
return self.execute(query, row)
def find_sql(self, table, rows = None):
values = list()
if (rows):
if (type(rows) == type(list())):
rows_list = rows
else:
rows_list = list()
rows_list.append(rows)
query_parts = list()
for row in rows_list:
statements = list()
for key, value in row.items():
if (value == None):
statements.append("\"%s\" IS ?" % (key))
else:
statements.append("\"%s\" = ?" % (key))
values.append(value)
query_parts.append('(%s)' % ' AND '.join(statements))
query = 'SELECT * FROM "%s" WHERE %s' % (table, ' OR '.join(query_parts))
else:
query = 'SELECT * FROM "%s"' % table
return query, values
def find(self, table, row = None):
query, value = self.find_sql(table, row)
return self.execute_get_row(query, value)
def findall(self, table, row = None):
query, values = self.find_sql(table, row)
return self.execute_get_rows(query, values)
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