def parse_multiple_query(self, param):
tables = []
condition = true()
order_by = []
group_by = []
limit = __default_limit__
total = None
page = 0
columns = []
for k, v in param.items():
if isinstance(v, dict): # Schema
c = self.parse_param(k, v)
tables.append(c.table)
columns.extend(c.columns)
condition = c.condition & condition
if c.relation is not None:
condition = c.relation & condition
else:
if k.startswith('@'):
if k == '@limit':
limit = v
elif k == '@page':
page = v
elif k == '@order_by':
if isinstance(v, (str, unicode)):
orders = v.split(',')
else:
orders = v
for c in orders:
if '.' in c:
v = c.split('.')
if len(v) == 3:
schema_name, col_name, dir = v
else:
schema_name, col_name = v
dir = 'asc'
else:
col_name = c
dir = 'asc'
S = get_schema(schema_name)
col = S.get_column(col_name)
if dir == 'desc':
order_by.append(col.desc())
else:
order_by.append(col)
elif k == '@group_by':
if isinstance(v, (str, unicode)):
groups = v.split(',')
else:
groups = v
for c in groups:
if '.' in c:
schema_name, col_name = c.split('.')
S = get_schema(schema_name)
col = S.get_column(col_name)
group_by.append(col)
elif k == '@total':
total = v
config = Storage({})
config.tables = tables
config.condition = condition
config.columns = columns
config.order_by = order_by
config.group_by = group_by
config.page = page
config.limit = limit
config.total = total
return config
def parse_param(self, name, param):
"""
Parse schema parameter, it'll return
{
condition
columns
limit
order_by
group_by
total
page
table
name #schema name
}
:param name: schema name
:param param: schema query parameter
:return: dict
"""
S = get_schema(name)
# prepare condition
condition = true()
fields = []
columns = []
columns_param = {}
limit = __default_limit__
order_by = []
group_by = []
total = None
page = 0
table = S.__table__
relation = None
for k, v in param.items():
if k.startswith('@'):
if k == '@columns':
fields = v[:]
elif k == '@limit':
limit = v
elif k == '@page':
page = v
elif k == '@order_by':
if isinstance(v, (str, unicode)):
orders = v.split(',')
else:
orders = v
for c in orders:
if '.' in c:
col_name, dir = c.split('.')
else:
col_name = c
dir = 'asc'
col = S.get_column(col_name)
if dir == 'desc':
order_by.append(col.desc())
else:
order_by.append(col)
elif k == '@group_by':
if isinstance(v, (str, unicode)):
groups = v.split(',')
else:
groups = v
for c in groups:
col = S.get_column(c)
group_by.append(col)
elif k == '@total':
total = v
elif k == '@relation':
relation_key = name, v
relation = get_relation_condition(relation_key)
elif k.startswith('$'): # condition
c = self.parse_condition(S, k[1:], v)
if c is not None:
condition = c & condition
elif isinstance(v, dict): # guest schema
# todo nested schema
# if there is not one row, it'll using left join otherwise using standalone
# query
nested_alias, nested_name, nested_need_list = self.parse_entry(k)
nested_config = self.parse_param(nested_name, value)
if nested_need_list:
# insert resolve function
pass
else:
relation = name, nested_config.name
outerjoin_condition = get_relation_condition(relation)
if outerjoin_condition is None:
raise RelationError("Relation between {!r} can not be found".format(relation))
table.outerjoin(nested_config.table, outerjoin_condition)
condition = nested_config.condition & condition
columns.extend(nested_config.columns)
else:
# columns
if k not in fields:
fields.append(k)
columns.extend([S.get_column(x) for x in fields or S._fields_list]) # used for select
config = Storage({})
config.table = table
config.condition = condition
config.columns = columns
config.columns_param = columns_param
config.total = total
config.limit = limit
config.page = page
config.order_by = order_by
config.group_by = group_by
config.name = name
config.schema = S
config.relation = relation
return config
