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Multiple levels #26

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18 changes: 16 additions & 2 deletions django_pgjsonb/fields.py
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Original file line number Diff line number Diff line change
Expand Up @@ -356,9 +356,23 @@ class AsTransform(six.with_metaclass(TransformMeta, Transform)):

def as_sql(self, qn, connection):
lhs, params = qn.compile(self.lhs)
splited = lhs.split("->")
if "->" in lhs:
last = params
elif "#>" in lhs:
lhs = lhs.replace('#> %s)', '')
attrs = params[0]
i = 0
while i < len(attrs) - 1:
attr = "-> '" + attrs[i] + "'"
lhs += attr
i += 1
lhs += ' -> %s)'

last = [attrs[-1]]

splited = lhs.rsplit("->", 1)
lhs = "->>".join(["->".join(splited[:-1]), splited[-1]])
return "CAST(%s as %s)" % (lhs, self.type), params
return "CAST(%s as %s)" % (lhs, self.type), last

@property
def output_field(self):
Expand Down