Fixed #22962 -- Default values for ArrayField with migrations.

Fields normally try to force the default value to a string. As
translatable strings are not valid default values for ArrayField, we can
remove this behaviour which was causing issues with some migrations.

Thanks to @schinckel for the report.

1 files changed, 8 insertions, 0 deletions

diff --git a/django/contrib/postgres/fields/array.py b/django/contrib/postgres/fields/array.py
index 772ab9e586..dea9c0440d 100644
--- a/django/contrib/postgres/fields/array.py
+++ b/django/contrib/postgres/fields/array.py
@@ -94,6 +94,14 @@ class ArrayField(Field):
             value = [self.base_field.to_python(val) for val in vals]
         return value
 
+    def get_default(self):
+        """Overridden from the default to prevent string-mangling."""
+        if self.has_default():
+            if callable(self.default):
+                return self.default()
+            return self.default
+        return ''
+
     def value_to_string(self, obj):
         values = []
         vals = self._get_val_from_obj(obj)