Python MySQLdb.where方法代码示例

# 需要导入模块: import MySQLdb [as 别名]
# 或者: from MySQLdb import where [as 别名]
def select(self, tables, vars=None, what='*', where=None, order=None, group=None,
               limit=None, offset=None, _test=False):
        """
        Selects `what` from `tables` with clauses `where`, `order`,
        `group`, `limit`, and `offset`. Uses vars to interpolate.
        Otherwise, each clause can be a SQLQuery.

            >>> db = DB(None, {})
            >>> db.select('foo', _test=True)
            <sql: 'SELECT * FROM foo'>
            >>> db.select(['foo', 'bar'], where="foo.bar_id = bar.id", limit=5, _test=True)
            <sql: 'SELECT * FROM foo, bar WHERE foo.bar_id = bar.id LIMIT 5'>
        """
        if vars is None: vars = {}
        sql_clauses = self.sql_clauses(what, tables, where, group, order, limit, offset)
        clauses = [self.gen_clause(sql, val, vars) for sql, val in sql_clauses if val is not None]
        qout = SQLQuery.join(clauses)
        if _test: return qout
        return self.query(qout, processed=True) 

# 需要导入模块: import MySQLdb [as 别名]
# 或者: from MySQLdb import where [as 别名]
def where(self, table, what='*', order=None, group=None, limit=None,
              offset=None, _test=False, **kwargs):
        """
        Selects from `table` where keys are equal to values in `kwargs`.

            >>> db = DB(None, {})
            >>> db.where('foo', bar_id=3, _test=True)
            <sql: 'SELECT * FROM foo WHERE bar_id = 3'>
            >>> db.where('foo', source=2, crust='dewey', _test=True)
            <sql: "SELECT * FROM foo WHERE source = 2 AND crust = 'dewey'">
            >>> db.where('foo', _test=True)
            <sql: 'SELECT * FROM foo'>
        """
        where_clauses = []
        for k, v in kwargs.iteritems():
            where_clauses.append(k + ' = ' + sqlquote(v))

        if where_clauses:
            where = SQLQuery.join(where_clauses, " AND ")
        else:
            where = None

        return self.select(table, what=what, order=order,
                           group=group, limit=limit, offset=offset, _test=_test,
                           where=where) 

# 需要导入模块: import MySQLdb [as 别名]
# 或者: from MySQLdb import where [as 别名]
def select(self, tables, vars=None, what='*', where=None, order=None, group=None, 
               limit=None, offset=None, _test=False): 
        """
        Selects `what` from `tables` with clauses `where`, `order`, 
        `group`, `limit`, and `offset`. Uses vars to interpolate. 
        Otherwise, each clause can be a SQLQuery.
        
            >>> db = DB(None, {})
            >>> db.select('foo', _test=True)
            <sql: 'SELECT * FROM foo'>
            >>> db.select(['foo', 'bar'], where="foo.bar_id = bar.id", limit=5, _test=True)
            <sql: 'SELECT * FROM foo, bar WHERE foo.bar_id = bar.id LIMIT 5'>
        """
        if vars is None: vars = {}
        sql_clauses = self.sql_clauses(what, tables, where, group, order, limit, offset)
        clauses = [self.gen_clause(sql, val, vars) for sql, val in sql_clauses if val is not None]
        qout = SQLQuery.join(clauses)
        if _test: return qout
        return self.query(qout, processed=True) 

# 需要导入模块: import MySQLdb [as 别名]
# 或者: from MySQLdb import where [as 别名]
def where(self, table, what='*', order=None, group=None, limit=None, 
              offset=None, _test=False, **kwargs):
        """
        Selects from `table` where keys are equal to values in `kwargs`.
        
            >>> db = DB(None, {})
            >>> db.where('foo', bar_id=3, _test=True)
            <sql: 'SELECT * FROM foo WHERE bar_id = 3'>
            >>> db.where('foo', source=2, crust='dewey', _test=True)
            <sql: "SELECT * FROM foo WHERE source = 2 AND crust = 'dewey'">
            >>> db.where('foo', _test=True)
            <sql: 'SELECT * FROM foo'>
        """
        where_clauses = []
        for k, v in kwargs.iteritems():
            where_clauses.append(k + ' = ' + sqlquote(v))
            
        if where_clauses:
            where = SQLQuery.join(where_clauses, " AND ")
        else:
            where = None
            
        return self.select(table, what=what, order=order, 
               group=group, limit=limit, offset=offset, _test=_test, 
               where=where) 

# 需要导入模块: import MySQLdb [as 别名]
# 或者: from MySQLdb import where [as 别名]
def select(self, tables, vars=None, what='*', where=None, order=None, group=None, 
               limit=None, offset=None, _test=False): 
        """
        Selects `what` from `tables` with clauses `where`, `order`, 
        `group`, `limit`, and `offset`. Uses vars to interpolate. 
        Otherwise, each clause can be a SQLQuery.
        
            >>> db = DB(None, {})
            >>> db.select('foo', _test=True)
            <sql: 'SELECT * FROM foo'>
            >>> db.select(['foo', 'bar'], where="foo.bar_id = bar.id", limit=5, _test=True)
            <sql: 'SELECT * FROM foo, bar WHERE foo.bar_id = bar.id LIMIT 5'>
            >>> db.select('foo', where={'id': 5}, _test=True)
            <sql: 'SELECT * FROM foo WHERE id = 5'>
        """
        if vars is None: vars = {}
        sql_clauses = self.sql_clauses(what, tables, where, group, order, limit, offset)
        clauses = [self.gen_clause(sql, val, vars) for sql, val in sql_clauses if val is not None]
        qout = SQLQuery.join(clauses)
        if _test: return qout
        return self.query(qout, processed=True) 

# 需要导入模块: import MySQLdb [as 别名]
# 或者: from MySQLdb import where [as 别名]
def where(self, table, what='*', order=None, group=None, limit=None, 
              offset=None, _test=False, **kwargs):
        """
        Selects from `table` where keys are equal to values in `kwargs`.
        
            >>> db = DB(None, {})
            >>> db.where('foo', bar_id=3, _test=True)
            <sql: 'SELECT * FROM foo WHERE bar_id = 3'>
            >>> db.where('foo', source=2, crust='dewey', _test=True)
            <sql: "SELECT * FROM foo WHERE crust = 'dewey' AND source = 2">
            >>> db.where('foo', _test=True)
            <sql: 'SELECT * FROM foo'>
        """
        where = self._where_dict(kwargs)            
        return self.select(table, what=what, order=order, 
               group=group, limit=limit, offset=offset, _test=_test, 
               where=where) 

# 需要导入模块: import MySQLdb [as 别名]
# 或者: from MySQLdb import where [as 别名]
def delete(self, table, where, using=None, vars=None, _test=False): 
        """
        Deletes from `table` with clauses `where` and `using`.

            >>> db = DB(None, {})
            >>> name = 'Joe'
            >>> db.delete('foo', where='name = $name', vars=locals(), _test=True)
            <sql: "DELETE FROM foo WHERE name = 'Joe'">
        """
        if vars is None: vars = {}
        where = self._where(where, vars)

        q = 'DELETE FROM ' + table
        if using: q += ' USING ' + sqllist(using)
        if where: q += ' WHERE ' + where

        if _test: return q

        db_cursor = self._db_cursor()
        self._db_execute(db_cursor, q)
        if not self.ctx.transactions: 
            self.ctx.commit()
        return db_cursor.rowcount 

# 需要导入模块: import MySQLdb [as 别名]
# 或者: from MySQLdb import where [as 别名]
def _where(self, where, vars):
        if isinstance(where, (int, long)):
            where = "id = " + sqlparam(where)
        #@@@ for backward-compatibility
        elif isinstance(where, (list, tuple)) and len(where) == 2:
            where = SQLQuery(where[0], where[1])
        elif isinstance(where, SQLQuery):
            pass
        else:
            where = reparam(where, vars)
        return where 

# 需要导入模块: import MySQLdb [as 别名]
# 或者: from MySQLdb import where [as 别名]
def sql_clauses(self, what, tables, where, group, order, limit, offset):
        return (
            ('SELECT', what),
            ('FROM', sqllist(tables)),
            ('WHERE', where),
            ('GROUP BY', group),
            ('ORDER BY', order),
            ('LIMIT', limit),
            ('OFFSET', offset)) 

# 需要导入模块: import MySQLdb [as 别名]
# 或者: from MySQLdb import where [as 别名]
def update(self, tables, where, vars=None, _test=False, **values):
        """
        Update `tables` with clause `where` (interpolated using `vars`)
        and setting `values`.

            >>> db = DB(None, {})
            >>> name = 'Joseph'
            >>> q = db.update('foo', where='name = $name', name='bob', age=2,
            ...     created=SQLLiteral('NOW()'), vars=locals(), _test=True)
            >>> q
            <sql: "UPDATE foo SET age = 2, name = 'bob', created = NOW() WHERE name = 'Joseph'">
            >>> q.query()
            'UPDATE foo SET age = %s, name = %s, created = NOW() WHERE name = %s'
            >>> q.values()
            [2, 'bob', 'Joseph']
        """
        if vars is None: vars = {}
        where = self._where(where, vars)

        query = (
            "UPDATE " + sqllist(tables) +
            " SET " + sqlwhere(values, ', ') +
            " WHERE " + where)

        if _test: return query

        db_cursor = self._db_cursor()
        self._db_execute(db_cursor, query)
        if not self.ctx.transactions:
            self.ctx.commit()
        return db_cursor.rowcount 

# 需要导入模块: import MySQLdb [as 别名]
# 或者: from MySQLdb import where [as 别名]
def delete(self, table, where=None, using=None, vars=None, _test=False):
        # firebird doesn't support using clause
        using = None
        return DB.delete(self, table, where, using, vars, _test) 

# 需要导入模块: import MySQLdb [as 别名]
# 或者: from MySQLdb import where [as 别名]
def _where(self, where, vars): 
        if isinstance(where, (int, long)):
            where = "id = " + sqlparam(where)
        #@@@ for backward-compatibility
        elif isinstance(where, (list, tuple)) and len(where) == 2:
            where = SQLQuery(where[0], where[1])
        elif isinstance(where, SQLQuery):
            pass
        else:
            where = reparam(where, vars)        
        return where 

# 需要导入模块: import MySQLdb [as 别名]
# 或者: from MySQLdb import where [as 别名]
def sql_clauses(self, what, tables, where, group, order, limit, offset): 
        return (
            ('SELECT', what),
            ('FROM', sqllist(tables)),
            ('WHERE', where),
            ('GROUP BY', group),
            ('ORDER BY', order),
            ('LIMIT', limit),
            ('OFFSET', offset)) 

# 需要导入模块: import MySQLdb [as 别名]
# 或者: from MySQLdb import where [as 别名]
def update(self, tables, where, vars=None, _test=False, **values): 
        """
        Update `tables` with clause `where` (interpolated using `vars`)
        and setting `values`.

            >>> db = DB(None, {})
            >>> name = 'Joseph'
            >>> q = db.update('foo', where='name = $name', name='bob', age=2,
            ...     created=SQLLiteral('NOW()'), vars=locals(), _test=True)
            >>> q
            <sql: "UPDATE foo SET age = 2, name = 'bob', created = NOW() WHERE name = 'Joseph'">
            >>> q.query()
            'UPDATE foo SET age = %s, name = %s, created = NOW() WHERE name = %s'
            >>> q.values()
            [2, 'bob', 'Joseph']
        """
        if vars is None: vars = {}
        where = self._where(where, vars)

        query = (
          "UPDATE " + sqllist(tables) + 
          " SET " + sqlwhere(values, ', ') + 
          " WHERE " + where)

        if _test: return query
        
        db_cursor = self._db_cursor()
        self._db_execute(db_cursor, query)
        if not self.ctx.transactions: 
            self.ctx.commit()
        return db_cursor.rowcount 

# 需要导入模块: import MySQLdb [as 别名]
# 或者: from MySQLdb import where [as 别名]
def delete(self, table, where=None, using=None, vars=None, _test=False):
        # firebird doesn't support using clause
        using=None
        return DB.delete(self, table, where, using, vars, _test)