Add conversion functions.

CHANGELOG.md

@@ -1,6 +1,7 @@
 ## 2.0.1.dev
 - Added `ngram` function
 - Added `is_empty` and `is_nonempty` functions
+- Added `to_string`, `to_number`, `to_time`, and `to_date` functions
 
 ## 2.0.0 (March 19, 2018)
 

faunadb/query.py

@@ -557,6 +557,18 @@ def not_(boolean):
  """See the `docs <https://fauna.com/documentation/queries#misc_functions>`__."""
  return _fn({"not": boolean})
 
+def to_string(expr):
+ return _fn({"to_string": expr})
+
+def to_number(expr):
+ return _fn({"to_number": expr})
+
+def to_time(expr):
+ return _fn({"to_time": expr})
+
+def to_date(expr):
+ return _fn({"to_date": expr})
+
 #endregion
 
 #region Helpers

tests/test_query.py

@@ -628,6 +628,19 @@ def test_not(self):
  self.assertFalse(self._q(query.not_(True)))
  self.assertTrue(self._q(query.not_(False)))
 
+ def test_to_string(self):
+ self.assertEqual(self._q(query.to_string(42)), "42")
+
+ def test_to_number(self):
+ self.assertEqual(self._q(query.to_number("42")), 42)
+
+ def test_to_time(self):
+ time = "1970-01-01T00:00:00Z"
+ self.assertEqual(self._q(query.to_time(time)), FaunaTime(time))
+
+ def test_to_date(self):
+ self.assertEqual(self._q(query.to_date("1970-01-01")), date(1970, 1, 1))
+
  #endregion
 
  #region Helpers tests

tests/test_serialization.py

@@ -293,7 +293,8 @@ def test_ngram(self):
  self.assertJson(query.ngram("str"), '{"ngram":"str"}')
  self.assertJson(query.ngram(["str0", "str1"]), '{"ngram":["str0","str1"]}')
  self.assertJson(query.ngram("str", min=2, max=3), '{"max":3,"min":2,"ngram":"str"}')
- self.assertJson(query.ngram(["str0", "str1"], min=2, max=3), '{"max":3,"min":2,"ngram":["str0","str1"]}')
+ self.assertJson(query.ngram(["str0", "str1"], min=2, max=3),
+ '{"max":3,"min":2,"ngram":["str0","str1"]}')
 
  #endregion
 
@@ -412,6 +413,19 @@ def test_or_expr(self):
  def test_not_expr(self):
  self.assertJson(query.not_(False), '{"not":false}')
 
+ def test_to_string_expr(self):
+ self.assertJson(query.to_string(42), '{"to_string":42}')
+
+ def test_to_number_expr(self):
+ self.assertJson(query.to_number("42"), '{"to_number":"42"}')
+
+ def test_to_time_expr(self):
+ self.assertJson(query.to_time("1970-01-01T00:00:00Z"),
+ '{"to_time":"1970-01-01T00:00:00Z"}')
+
+ def test_to_date_expr(self):
+ self.assertJson(query.to_date("1970-01-01"), '{"to_date":"1970-01-01"}')
+
  #endregion
 
  def assertJson(self, obj, expected):