class StatementCursor(CommandCursor):
"""StatementCursor object.
This is the main cursor used in the code, at
the moment. The highlevel cursors will be
based on this cursor. This cursor has a
member 'stmt' which is a Statement from
useless-sqlgen.
"""
def __init__(self, conn, name=None):
CommandCursor.__init__(self, conn, name=name)
self.stmt = Statement("select")
def set_table(self, table):
"Set the table for the statement"
self.stmt.table = table
def set_clause(self, items, cmp="=", join="and"):
"""Set the clause for the statement.
This should be updated to accept clause
objects, this member is old now."""
self.stmt.set_clause(items, cmp=cmp, join=join)
def set_data(self, data):
"""Sets the data member of the statement
for update and insert statements."""
self.stmt.set(data)
def set_fields(self, fields):
"""Sets the fields of the statement
for select statements."""
self.stmt.fields = fields
def delete(self, table=None, clause=None):
"Perform DELETE FROM table WHERE clause"
query = self.stmt.delete(table=table, clause=clause)
self.execute(query)
def insert(self, table=None, data=None):
"Perform INSERT INTO table (data.keys) VALUES (data.values)"
query = self.stmt.insert(table=table, data=data)
self.execute(query)
def update(self, table=None, data=None, clause=None):
"Perform UPDATE table SET [key=value for items in data] WHERE clause"
query = self.stmt.update(table=table, data=data, clause=clause)
self.execute(query)
def select(self, fields=None, table=None, clause=None, group=None, having=None, order=None):
"Perform SELECT fields FROM table WHERE clause"
query = self.stmt.select(fields=fields, table=table, clause=clause, group=group, having=having, order=order)
self.execute(query)
return self.fetchall()
def iselect(self, fields=None, table=None, clause=None, group=None, having=None, order=None):
"""iselect is a way to use this cursor as an
iterator. Like, for row in cursor.iselect():
"""
query = self.stmt.select(fields=fields, table=table, clause=clause, group=group, having=having, order=order)
self.execute(query)
self._already_selected = True
return self
def select_row(self, fields=None, table=None, clause=None, group=None, having=None, order=None):
"""Select one row from the database successfully.
You can use this member when you need to return
exactly one row, or raise an error.
"""
query = self.stmt.select(fields=fields, table=table, clause=clause, group=group, having=having, order=order)
self.execute(query)
rows = len(self)
if rows == 1:
return self.next()
elif rows == 0:
raise NoExistError
else:
raise RuntimeError, "bad row count %s" % rows
def delete_file(self, conn, field, clause):
"""delete_file uses select_row to ensure only one
file is deleted."""
row = self.select_row(fields=[field], clause=clause)
conn.removefile(int(row[field].name))
def update_file(self, conn, field, clause, fileobj):
self.delete_file(conn, field, clause)
newfile = self.file(conn)
update = {field: newfile.name}
newfile.write(fileobj.read())
newfile.close()
self.update(data=update, clause=clause)
def open_file(self, conn, field, clause):
row = self.select_row(fields=[field], clause=clause)
return self.openfile(conn, row[field].name)
def clear(self, **args):
"Clears the statement"
self.stmt.clear(**args)
def fields(self, table=None):
"""fields here uses the fact that the stmt
object may have a table set."""
if table is None:
table = self.stmt.table
return CommandCursor.fields(self, table)
class BaseDatabase(QSqlDatabase):
def __init__(self, dsn, name, parent=None, objname=None):
deprecated('useless.kdedb.BaseDatabase is deprecated')
QSqlDatabase.__init__(self, 'QPSQL7', name, parent, objname)
if hasattr(dsn, 'items'): #if dsn is dictionary
self.conn = BasicConnection(**dsn)
self.setDatabaseName(dsn['dbname'])
self.setHostName(dsn['host'])
self.dbuser = dsn['user']
else: #else a conn was passed as dsn
self.conn = dsn
self.setDatabaseName(self.conn.conn.db)
self.setHostName(self.conn.conn.host)
self.dbuser = self.conn.conn.user
self.setUserName(self.dbuser)
self.stmt = Statement()
self.mcursor = StatementCursor(self.conn)
def set_table(self, table):
self.stmt.table = table
def set_clause(self, items, cmp='=', join='and'):
self.stmt.set_clause(items, cmp=cmp, join=join)
def set_data(self, data):
self.stmt.set(data)
def set_fields(self, fields):
self.stmt.fields = fields
def qdelete(self, table=None, clause=None):
query = self.stmt.delete(table=table, clause=clause)
return self.execStatement(query)
def qinsert(self, table=None, data=None):
query = self.stmt.insert(table=table, data=data)
return self.execStatement(query)
def qupdate(self, table=None, data=None, clause=None):
query = self.stmt.update(table=table, data=data, clause=clause)
return self.execStatement(query)
def qselect(self, fields=None, table=None, clause=None,
group=None, having=None, order=None):
query = self.stmt.select(fields=fields, table=table, clause=clause,
group=group, having=having, order=order)
return self.execStatement(query)
def delete(self, table=None, clause=None):
query = self.stmt.delete(table=table, clause=clause)
return self.mcursor.execute(query)
def insert(self, table=None, data=None):
query = self.stmt.insert(table=table, data=data)
return self.mcursor.execute(query)
def update(self, table=None, data=None, clause=None):
query = self.stmt.update(table=table, data=data, clause=clause)
return self.mcursor.execute(query)
def select(self, fields=None, table=None, clause=None,
group=None, having=None, order=None):
query = self.stmt.select(fields=fields, table=table, clause=clause,
group=group, having=having, order=order)
self.mcursor.execute(query)
return self.mcursor.fetchall()
def select_row(self, fields=None, table=None, clause=None,
group=None, having=None, order=None):
query = self.stmt.select(fields=fields, table=table, clause=clause,
group=group, having=having, order=order)
self.mcursor.execute(query)
rows = len(self.mcursor)
if rows == 1:
return self.mcursor.next()
elif rows == 0:
raise NoExistError
else:
raise RuntimeError, 'bad row count %s' % rows
def clear(self, **args):
self.stmt.clear(**args)
def stdclause(self, data):
return reduce(and_, [Eq(k, v) for k,v in data.items()])
def insertData(self, idcol, table, data, commit=True):
clause = self.stdclause(data)
try:
self.mcursor.select_row(fields=[idcol], table=table, clause=clause)
except NoExistError:
self.mcursor.insert(table=table, data=data)
if commit:
self.conn.commit()
def identifyData(self, idcol, table, data, commit=True):
clause = self.stdclause(data)
self.insertData(idcol, table, data, commit=commit)
return self.mcursor.select_row(fields=['*'], table=table, clause=clause)
class BaseDatabase(object):
def __init__(self, conn=None):
if conn is None:
self.conn = KonsultantConnection()
else:
self.conn = conn
self.stmt = Statement()
self.mcursor = StatementCursor(self.conn)
def set_table(self, table):
self.stmt.table = table
def set_clause(self, items, cmp='=', join='and'):
self.stmt.set_clause(items, cmp=cmp, join=join)
def set_data(self, data):
self.stmt.set(data)
def set_fields(self, fields):
self.stmt.fields = fields
def delete(self, table=None, clause=None):
query = self.stmt.delete(table=table, clause=clause)
return self.mcursor.execute(query)
def insert(self, table=None, data=None):
query = self.stmt.insert(table=table, data=data)
return self.mcursor.execute(query)
def update(self, table=None, data=None, clause=None):
query = self.stmt.update(table=table, data=data, clause=clause)
return self.mcursor.execute(query)
def select(self, fields=None, table=None, clause=None,
group=None, having=None, order=None):
query = self.stmt.select(fields=fields, table=table, clause=clause,
group=group, having=having, order=order)
self.mcursor.execute(query)
return self.mcursor.fetchall()
def select_row(self, fields=None, table=None, clause=None,
group=None, having=None, order=None):
query = self.stmt.select(fields=fields, table=table, clause=clause,
group=group, having=having, order=order)
self.mcursor.execute(query)
rows = len(self.mcursor)
if rows == 1:
return self.mcursor.next()
elif rows == 0:
raise NoExistError
else:
raise Error, 'bad row count %s' % rows
def clear(self, **args):
self.stmt.clear(**args)
def stdclause(self, data):
return reduce(and_, [Eq(k, v) for k,v in data.items()])
def insertData(self, idcol, table, data, commit=True):
clause = self.stdclause(data)
try:
self.mcursor.select_row(fields=[idcol], table=table, clause=clause)
except NoExistError:
self.mcursor.insert(table=table, data=data)
if commit:
self.conn.commit()
def identifyData(self, idcol, table, data, commit=True):
clause = self.stdclause(data)
self.insertData(idcol, table, data, commit=commit)
return self.mcursor.select_row(fields=['*'], table=table, clause=clause)
