core: make FieldMatcherRule’s user_field into dropdown

passbook/core/forms/rules.py

@@ -15,7 +15,6 @@ class FieldMatcherRuleForm(forms.ModelForm):
         fields = GENERAL_FIELDS + ['user_field', 'match_action', 'value', ]
         widgets = {
             'name': forms.TextInput(),
-            'user_field': forms.TextInput(),
             'value': forms.TextInput(),
         }
 

passbook/core/migrations/0002_auto_20181210_1011.py

@@ -0,0 +1,18 @@
+# Generated by Django 2.1.4 on 2018-12-10 10:11
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('passbook_core', '0001_initial'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='fieldmatcherrule',
+            name='user_field',
+            field=models.TextField(choices=[('username', 'username'), ('first_name', 'first_name'), ('last_name', 'last_name'), ('email', 'email'), ('is_staff', 'is_staff'), ('is_active', 'is_active'), ('data_joined', 'data_joined')]),
+        ),
+    ]

passbook/core/models.py

@@ -141,7 +141,17 @@ class FieldMatcherRule(Rule):
         (MATCH_EXACT, _('Exact')),
     )
 
-    user_field = models.TextField()
+    USER_FIELDS = (
+        ('username', 'username',),
+        ('first_name', 'first_name',),
+        ('last_name', 'last_name',),
+        ('email', 'email',),
+        ('is_staff', 'is_staff',),
+        ('is_active', 'is_active',),
+        ('data_joined', 'data_joined',),
+    )
+
+    user_field = models.TextField(choices=USER_FIELDS)
     match_action = models.CharField(max_length=50, choices=MATCHES)
     value = models.TextField()