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Provide a sorted operator #25

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Provide a sorted operator #25

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8 changes: 8 additions & 0 deletions jsonpath_rw/jsonpath.py
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Original file line number Diff line number Diff line change
Expand Up @@ -206,6 +206,14 @@ def __repr__(self):
def __eq__(self, other):
return isinstance(other, This)

class SortedThis(This):

def find(self, datum):
"""Return sorted value of This if list or dict."""
if isinstance(datum.value, dict) or isinstance(datum.value, list):
return [DatumInContext.wrap(value) for value in sorted(datum.value)]
return datum

class Child(JSONPath):
"""
JSONPath that first matches the left, then the right.
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2 changes: 2 additions & 0 deletions jsonpath_rw/parser.py
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Original file line number Diff line number Diff line change
Expand Up @@ -95,6 +95,8 @@ def p_jsonpath_named_operator(self, p):
"jsonpath : NAMED_OPERATOR"
if p[1] == 'this':
p[0] = This()
elif p[1] == 'sorted':
p[0] = SortedThis()
elif p[1] == 'parent':
p[0] = Parent()
else:
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5 changes: 4 additions & 1 deletion tests/test_jsonpath.py
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Expand Up @@ -105,7 +105,10 @@ def test_fields_value(self):
self.check_cases([ ('foo', {'foo': 'baz'}, ['baz']),
('foo,baz', {'foo': 1, 'baz': 2}, [1, 2]),
('@foo', {'@foo': 1}, [1]),
('*', {'foo': 1, 'baz': 2}, set([1, 2])) ])
('*', {'foo': 1, 'baz': 2}, set([1, 2])),
('objects.`sorted`', {'objects': ['alpha', 'gamma', 'beta']}, ['alpha', 'beta', 'gamma']),
('objects.`sorted`', {'objects': {'cow': 'moo', 'horse': 'neigh', 'cat': 'meow'}}, ['cat', 'cow', 'horse']),
])

jsonpath.auto_id_field = 'id'
self.check_cases([ ('*', {'foo': 1, 'baz': 2}, set([1, 2, '`this`'])) ])
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