alter all foreign key to protect

app/entities/migrations/0005_auto_20190929_1603.py

+# Generated by Django 2.2 on 2019-09-29 16:03
+
+from django.conf import settings
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('entities', '0004_auto_20190928_1656'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='changerequestformapprovers',
+            name='form_code',
+            field=models.ForeignKey(on_delete=django.db.models.deletion.PROTECT, related_name='frm_approvers', to='entities.ChangeRequestFormHeader', to_field='form_code'),
+        ),
+        migrations.AlterField(
+            model_name='changerequestformapprovers',
+            name='tmp_approver',
+            field=models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.PROTECT, to='entities.ChangeRequestTemplateApprovers', to_field='code'),
+        ),
+        migrations.AlterField(
+            model_name='changerequestformapprovers',
+            name='user',
+            field=models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.PROTECT, to=settings.AUTH_USER_MODEL, to_field='code'),
+        ),
+        migrations.AlterField(
+            model_name='changerequestformattachments',
+            name='form_code',
+            field=models.ForeignKey(on_delete=django.db.models.deletion.PROTECT, related_name='frm_attachments', to='entities.ChangeRequestFormHeader', to_field='form_code'),
+        ),
+        migrations.AlterField(
+            model_name='changerequestformattachments',
+            name='tmp_attach',
+            field=models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.PROTECT, related_name='template_attachments', to='entities.ChangeRequestTemplateAttachments', to_field='code'),
+        ),
+        migrations.AlterField(
+            model_name='changerequestformattachments',
+            name='uploaded_by',
+            field=models.ForeignKey(on_delete=django.db.models.deletion.PROTECT, to=settings.AUTH_USER_MODEL, to_field='code'),
+        ),
+        migrations.AlterField(
+            model_name='changerequestformdetails',
+            name='form_code',
+            field=models.ForeignKey(on_delete=django.db.models.deletion.PROTECT, related_name='frm_details', to='entities.ChangeRequestFormHeader', to_field='form_code'),
+        ),
+        migrations.AlterField(
+            model_name='changerequestformdetails',
+            name='tmp_detail',
+            field=models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.PROTECT, to='entities.ChangeRequestTemplateDetails', to_field='code'),
+        ),
+        migrations.AlterField(
+            model_name='changerequestformheader',
+            name='requested_by_department',
+            field=models.ForeignKey(on_delete=django.db.models.deletion.PROTECT, related_name='requested_by_department', to='entities.Department', to_field='code'),
+        ),
+        migrations.AlterField(
+            model_name='changerequestformheader',
+            name='requested_by_user',
+            field=models.ForeignKey(on_delete=django.db.models.deletion.PROTECT, related_name='requested_by_user', to=settings.AUTH_USER_MODEL, to_field='code'),
+        ),
+        migrations.AlterField(
+            model_name='changerequestformheader',
+            name='requested_to_company',
+            field=models.ForeignKey(on_delete=django.db.models.deletion.PROTECT, to='entities.Company', to_field='code'),
+        ),
+        migrations.AlterField(
+            model_name='changerequestformheader',
+            name='requested_to_department',
+            field=models.ForeignKey(on_delete=django.db.models.deletion.PROTECT, to='entities.Department', to_field='code'),
+        ),
+        migrations.AlterField(
+            model_name='changerequestformheader',
+            name='requested_to_user',
+            field=models.ForeignKey(on_delete=django.db.models.deletion.PROTECT, to=settings.AUTH_USER_MODEL, to_field='code'),
+        ),
+        migrations.AlterField(
+            model_name='changerequestformheader',
+            name='template_no',
+            field=models.ForeignKey(on_delete=django.db.models.deletion.PROTECT, to='entities.ChangeRequestTemplateHeader', to_field='template_no'),
+        ),
+        migrations.AlterField(
+            model_name='changerequestformstakeholders',
+            name='form_code',
+            field=models.ForeignKey(on_delete=django.db.models.deletion.PROTECT, related_name='frm_stakes', to='entities.ChangeRequestFormHeader', to_field='form_code'),
+        ),
+        migrations.AlterField(
+            model_name='changerequestformstakeholders',
+            name='tmp_stake',
+            field=models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.PROTECT, to='entities.ChangeRequestTemplateStakeHolders', to_field='code'),
+        ),
+        migrations.AlterField(
+            model_name='changerequestformstakeholders',
+            name='user',
+            field=models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.PROTECT, to=settings.AUTH_USER_MODEL, to_field='code'),
+        ),
+        migrations.AlterField(
+            model_name='changerequesttemplateapprovers',
+            name='template_no',
+            field=models.ForeignKey(on_delete=django.db.models.deletion.PROTECT, related_name='tmp_approvers', to='entities.ChangeRequestTemplateHeader', to_field='template_no'),
+        ),
+        migrations.AlterField(
+            model_name='changerequesttemplateapprovers',
+            name='user',
+            field=models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.PROTECT, to=settings.AUTH_USER_MODEL, to_field='code'),
+        ),
+        migrations.AlterField(
+            model_name='changerequesttemplateattachments',
+            name='template_no',
+            field=models.ForeignKey(on_delete=django.db.models.deletion.PROTECT, related_name='tmp_attachments', to='entities.ChangeRequestTemplateHeader', to_field='template_no'),
+        ),
+        migrations.AlterField(
+            model_name='changerequesttemplateattachments',
+            name='uploaded_by',
+            field=models.ForeignKey(on_delete=django.db.models.deletion.PROTECT, to=settings.AUTH_USER_MODEL, to_field='code'),
+        ),
+        migrations.AlterField(
+            model_name='changerequesttemplatedetails',
+            name='template_no',
+            field=models.ForeignKey(on_delete=django.db.models.deletion.PROTECT, related_name='tmp_details', to='entities.ChangeRequestTemplateHeader', to_field='template_no'),
+        ),
+        migrations.AlterField(
+            model_name='changerequesttemplateheader',
+            name='created_by_department',
+            field=models.ForeignKey(on_delete=django.db.models.deletion.PROTECT, related_name='created_by_department', to='entities.Department', to_field='code'),
+        ),
+        migrations.AlterField(
+            model_name='changerequesttemplateheader',
+            name='created_by_user',
+            field=models.ForeignKey(on_delete=django.db.models.deletion.PROTECT, related_name='created_by_user', to=settings.AUTH_USER_MODEL, to_field='code'),
+        ),
+        migrations.AlterField(
+            model_name='changerequesttemplateheader',
+            name='requested_to_company',
+            field=models.ForeignKey(on_delete=django.db.models.deletion.PROTECT, to='entities.Company', to_field='code'),
+        ),
+        migrations.AlterField(
+            model_name='changerequesttemplateheader',
+            name='requested_to_department',
+            field=models.ForeignKey(on_delete=django.db.models.deletion.PROTECT, to='entities.Department', to_field='code'),
+        ),
+        migrations.AlterField(
+            model_name='changerequesttemplateheader',
+            name='requested_to_user',
+            field=models.ForeignKey(on_delete=django.db.models.deletion.PROTECT, to=settings.AUTH_USER_MODEL, to_field='code'),
+        ),
+        migrations.AlterField(
+            model_name='changerequesttemplatestakeholders',
+            name='template_no',
+            field=models.ForeignKey(on_delete=django.db.models.deletion.PROTECT, related_name='tmp_stakes', to='entities.ChangeRequestTemplateHeader', to_field='template_no'),
+        ),
+        migrations.AlterField(
+            model_name='changerequesttemplatestakeholders',
+            name='user',
+            field=models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.PROTECT, to=settings.AUTH_USER_MODEL, to_field='code'),
+        ),
+        migrations.AlterField(
+            model_name='entitylog',
+            name='entity',
+            field=models.CharField(choices=[('USER', 'USER'), ('APPLICATION', 'APPLICATION'), ('COMPANY', 'COMPANY'), ('DEPARTMENT', 'DEPARTMENT'), ('MODULE', 'MODULE'), ('ChangeRequestTemplateHeader', 'ChangeRequestTemplateHeader'), ('ChangeRequestTemplateApprovers', 'ChangeRequestTemplateApprovers'), ('ChangeRequestTemplateStakeHolders', 'ChangeRequestTemplateStakeHolders'), ('ChangeRequestTemplateAttachments', 'ChangeRequestTemplateAttachments'), ('ChangeRequestTemplateDetails', 'ChangeRequestTemplateDetails'), ('ChangeRequestFormHeader', 'ChangeRequestFormHeader'), ('ChangeRequestFormApprovers', 'ChangeRequestFormApprovers'), ('ChangeRequestFormStakeHolders', 'ChangeRequestFormStakeHolders'), ('ChangeRequestFormAttachments', 'ChangeRequestFormAttachments'), ('ChangeRequestFormDetails', 'ChangeRequestFormDetails')], default='Add', max_length=50),
+        ),
+    ]

app/entities/models.py

@@ -366,17 +366,17 @@ class BaseHeader(models.Model):
 
     requested_to_company = models.ForeignKey(
         Company,
-        on_delete=models.DO_NOTHING,
+        on_delete=models.PROTECT,
         to_field='code')
 
     requested_to_department = models.ForeignKey(
         Department,
-        on_delete=models.DO_NOTHING,
+        on_delete=models.PROTECT,
         to_field='code')
 
     requested_to_user = models.ForeignKey(
         User,
-        on_delete=models.DO_NOTHING,
+        on_delete=models.PROTECT,
         to_field='code')
 
     requested_to_template_name = models.CharField(max_length=255)
@@ -406,7 +406,7 @@ class BaseApprover(models.Model):
         User,
         blank=True,
         null=True,
-        on_delete=models.DO_NOTHING,
+        on_delete=models.PROTECT,
         to_field='code')
 
     delegation = models.CharField(max_length=50, blank=True, null=True)
@@ -423,7 +423,7 @@ class BaseStakeholder(models.Model):
         User,
         blank=True,
         null=True,
-        on_delete=models.DO_NOTHING,
+        on_delete=models.PROTECT,
         to_field='code')
     delegation = models.CharField(
         max_length=255,
@@ -461,7 +461,7 @@ class BaseAttachment(models.Model):
         null=True)
     uploaded_by = models.ForeignKey(
         User,
-        on_delete=models.DO_NOTHING,
+        on_delete=models.PROTECT,
         to_field='code')
     created = models.DateTimeField(
         blank=True,
@@ -513,13 +513,13 @@ class ChangeRequestTemplateHeader(BaseHeader):
     
     created_by_user = models.ForeignKey(
         User,
-        on_delete=models.DO_NOTHING,
+        on_delete=models.PROTECT,
         to_field='code',
         related_name='created_by_user')
 
     created_by_department = models.ForeignKey(
         Department,
-        on_delete=models.DO_NOTHING,
+        on_delete=models.PROTECT,
         to_field='code',
         related_name='created_by_department')
     
@@ -548,7 +548,7 @@ class ChangeRequestTemplateApprovers(BaseApprover):
         max_length=255)  # primary key
     template_no = models.ForeignKey(
         ChangeRequestTemplateHeader,
-        on_delete=models.DO_NOTHING,
+        on_delete=models.PROTECT,
         to_field='template_no',
         related_name='tmp_approvers')
     
@@ -574,7 +574,7 @@ class ChangeRequestTemplateStakeHolders(BaseStakeholder):
         max_length=255)  # primary key
     template_no = models.ForeignKey(
         ChangeRequestTemplateHeader,
-        on_delete=models.DO_NOTHING,
+        on_delete=models.PROTECT,
         to_field='template_no',
         related_name='tmp_stakes')
         
@@ -607,7 +607,7 @@ class ChangeRequestTemplateAttachments(BaseAttachment):
     )
     template_no = models.ForeignKey(
         ChangeRequestTemplateHeader,
-        on_delete=models.DO_NOTHING,
+        on_delete=models.PROTECT,
         to_field='template_no',
         related_name='tmp_attachments')
     
@@ -633,7 +633,7 @@ class ChangeRequestTemplateDetails(BaseDetails):
         unique=True)
     template_no = models.ForeignKey(
         ChangeRequestTemplateHeader,
-        on_delete=models.DO_NOTHING,
+        on_delete=models.PROTECT,
         to_field='template_no',
         related_name='tmp_details')
     
@@ -664,7 +664,7 @@ class ChangeRequestFormHeader(BaseHeader):
         unique=True)
     requested_by_user = models.ForeignKey(
         User,
-        on_delete=models.DO_NOTHING,
+        on_delete=models.PROTECT,
         to_field='code',
         related_name='requested_by_user')
     cancel_date = models.DateTimeField(
@@ -672,12 +672,12 @@ class ChangeRequestFormHeader(BaseHeader):
         blank=True)
     requested_by_department = models.ForeignKey(
         Department,
-        on_delete=models.DO_NOTHING,
+        on_delete=models.PROTECT,
         to_field='code',
         related_name='requested_by_department')
     template_no = models.ForeignKey(
         ChangeRequestTemplateHeader,
-        on_delete=models.DO_NOTHING,
+        on_delete=models.PROTECT,
         to_field='template_no')
     status = models.CharField(max_length=50)
 
@@ -725,7 +725,7 @@ class ChangeRequestFormApprovers(BaseApprover):
         max_length=255)  # primary key
     form_code = models.ForeignKey(
         ChangeRequestFormHeader,
-        on_delete=models.DO_NOTHING,
+        on_delete=models.PROTECT,
         to_field='form_code',
         related_name='frm_approvers')
     remarks = models.CharField(
@@ -746,7 +746,7 @@ class ChangeRequestFormApprovers(BaseApprover):
         ChangeRequestTemplateApprovers,
         null=True,
         blank=True,
-        on_delete=models.DO_NOTHING,
+        on_delete=models.PROTECT,
         to_field='code')
 
     class Meta:
@@ -771,14 +771,14 @@ class ChangeRequestFormDetails(BaseDetails):
         max_length=255)  # primary key
     form_code = models.ForeignKey(
         ChangeRequestFormHeader,
-        on_delete=models.DO_NOTHING,
+        on_delete=models.PROTECT,
         to_field='form_code',
         related_name='frm_details')
     tmp_detail = models.ForeignKey(
         ChangeRequestTemplateDetails,
         null=True,
         blank=True,
-        on_delete=models.DO_NOTHING,
+        on_delete=models.PROTECT,
         to_field='code')
 
     class Meta:
@@ -803,7 +803,7 @@ class ChangeRequestFormStakeHolders(BaseStakeholder):
         max_length=255)  # primary key
     form_code = models.ForeignKey(
         ChangeRequestFormHeader,
-        on_delete=models.DO_NOTHING,
+        on_delete=models.PROTECT,
         to_field='form_code',
         related_name='frm_stakes')
     date_added = models.DateTimeField(
@@ -813,7 +813,7 @@ class ChangeRequestFormStakeHolders(BaseStakeholder):
         ChangeRequestTemplateStakeHolders,
         null=True,
         blank=True,
-        on_delete=models.DO_NOTHING,
+        on_delete=models.PROTECT,
         to_field='code')
 
     class Meta:
@@ -838,7 +838,7 @@ class ChangeRequestFormAttachments(BaseAttachment):
         max_length=255)  # primary key
     form_code = models.ForeignKey(
         ChangeRequestFormHeader,
-        on_delete=models.DO_NOTHING,
+        on_delete=models.PROTECT,
         to_field='form_code',
         related_name='frm_attachments')
     file_upload = models.ForeignKey(
@@ -853,7 +853,7 @@ class ChangeRequestFormAttachments(BaseAttachment):
         null=True,
         blank=True,
         related_name="template_attachments",
-        on_delete=models.DO_NOTHING,
+        on_delete=models.PROTECT,
         to_field='code')
 
     class Meta: