Avoid triggering migration creation using functions for choices and validators choices.

mayan/apps/converter/migrations/0005_auto_20150708_0118.py

@@ -0,0 +1,27 @@
+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+
+from django.db import models, migrations
+import converter.validators
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('converter', '0004_auto_20150704_0753'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='transformation',
+            name='arguments',
+            field=models.TextField(help_text='Enter the arguments for the transformation as a YAML dictionary. ie: {"degrees": 180}', blank=True, verbose_name='Arguments', validators=[converter.validators.YAMLValidator()]),
+            preserve_default=True,
+        ),
+        migrations.AlterField(
+            model_name='transformation',
+            name='name',
+            field=models.CharField(max_length=128, verbose_name='Name', choices=[('rotate', 'Rotate: degrees'), ('zoom', 'Zoom: percent'), ('resize', 'Resize: width, height')]),
+            preserve_default=True,
+        ),
+    ]

mayan/apps/converter/migrations/0006_auto_20150708_0120.py

@@ -0,0 +1,21 @@
+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+
+from django.db import models, migrations
+import converter.models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('converter', '0005_auto_20150708_0118'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='transformation',
+            name='arguments',
+            field=models.TextField(help_text='Enter the arguments for the transformation as a YAML dictionary. ie: {"degrees": 180}', blank=True, verbose_name='Arguments', validators=converter.models.validators),
+            preserve_default=True,
+        ),
+    ]

mayan/apps/converter/models.py

@@ -16,6 +16,10 @@ from .validators import YAMLValidator
 logger = logging.getLogger(__name__)
 
 
+def validators():
+    return [YAMLValidator()]
+
+
 @python_2_unicode_compatible
 class Transformation(models.Model):
     """
@@ -29,7 +33,7 @@ class Transformation(models.Model):
 
     order = models.PositiveIntegerField(blank=True, db_index=True, default=0, help_text=_('Order in which the transformations will be executed.'), null=True, verbose_name=_('Order'))
     name = models.CharField(choices=BaseTransformation.get_transformation_choices(), max_length=128, verbose_name=_('Name'))
-    arguments = models.TextField(blank=True, help_text=_('Enter the arguments for the transformation as a YAML dictionary. ie: {"degrees": 180}'), validators=[YAMLValidator()], verbose_name=_('Arguments'))
+    arguments = models.TextField(blank=True, help_text=_('Enter the arguments for the transformation as a YAML dictionary. ie: {"degrees": 180}'), validators=validators, verbose_name=_('Arguments'))
 
     objects = TransformationManager()
 

mayan/apps/metadata/migrations/0002_auto_20150708_0118.py

@@ -0,0 +1,20 @@
+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+
+from django.db import models, migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('metadata', '0001_initial'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='metadatatype',
+            name='validation',
+            field=models.CharField(blank=True, max_length=64, verbose_name='Validation function name', choices=[(b'metadata.validators.DateAndTimeValidator', b'metadata.validators.DateAndTimeValidator'), (b'metadata.validators.DateValidator', b'metadata.validators.DateValidator'), (b'metadata.validators.TimeValidator', b'metadata.validators.TimeValidator')]),
+            preserve_default=True,
+        ),
+    ]

mayan/apps/metadata/models.py

@@ -11,6 +11,10 @@ from .managers import MetadataTypeManager
 from .settings import setting_available_validators
 
 
+def validation_choices():
+    return zip(setting_available_validators.value, setting_available_validators.value)
+
+
 @python_2_unicode_compatible
 class MetadataType(models.Model):
     """
@@ -27,7 +31,7 @@ class MetadataType(models.Model):
     lookup = models.TextField(blank=True, null=True,
                               verbose_name=_('Lookup'),
                               help_text=_('Enter a string to be evaluated that returns an iterable.'))
-    validation = models.CharField(blank=True, choices=zip(setting_available_validators.value, setting_available_validators.value), max_length=64, verbose_name=_('Validation function name'))
+    validation = models.CharField(blank=True, choices=validation_choices(), max_length=64, verbose_name=_('Validation function name'))
     # TODO: Find a different way to let users know what models and functions are
     # available now that we removed these from the help_text
     objects = MetadataTypeManager()