fix escaping of special characters in text lookups

Author: timgraham

.github/workflows/test-python.yml

@@ -70,6 +70,7 @@ jobs:
           basic
           empty
           from_db_value
+          lookup.tests.LookupTests.test_escaping
           model_fields.test_datetimefield
           model_fields.test_decimalfield
           model_fields.test_charfield

django_mongodb/operations.py

@@ -48,6 +48,10 @@ def convert_uuidfield_value(self, value, expression, connection):
             value = uuid.UUID(value)
         return value
 
+    def prep_for_like_query(self, x):
+        # Override value escaping for LIKE queries.
+        return str(x)
+
     def quote_name(self, name):
         if name.startswith('"') and name.endswith('"'):
             return name  # Quoting once is enough.