dal.py 文件源码

def delete(self,tablename,query):
        if not isinstance(query,Query):
            raise SyntaxError("Not Supported")
        if query.first.type=='id' and query.op==self.EQ:
            id = query.second
            tablename = query.first.tablename
            assert(tablename == query.first.tablename)
            ctable = self.connection[tablename]
            try:
                del ctable[str(id)]
                return 1
            except couchdb.http.ResourceNotFound:
                return 0
        else:
            tablename = self.get_table(query)
            rows = self.select(query,[self.db[tablename]._id],{})
            ctable = self.connection[tablename]
            for row in rows:
                del ctable[str(row.id)]
            return len(rows)