add backups for the abstract phid and dhid

ereuse_devicehub/inventory/views.py

@@ -279,6 +279,11 @@ class BindingView(GenericMixin):
         self.abstract_dhid = self.old_device.devicehub_id
         self.abstract_phid = self.old_placeholder.phid
 
+        # to do a backup of abstract_dhid and abstract_phid in
+        # workbench device
+        self.abstract_device.dhid_bk = self.abstract_dhid
+        self.abstract_device.phid_bk = self.abstract_phid
+
     def post(self):
         for plog in PlaceholdersLog.query.filter_by(
             placeholder_id=self.old_placeholder.id
@@ -379,6 +384,17 @@ class UnBindingView(GenericMixin):
                     c.binding.device.parent = new_device
 
         placeholder = Placeholder(device=new_device, binding=device, is_abstract=True)
+        if (
+            device.dhid_bk
+            and not Device.query.filter_by(devicehub_id=device.dhid_bk).first()
+        ):
+            new_device.devicehub_id = device.dhid_bk
+        if (
+            device.phid_bk
+            and not Placeholder.query.filter_by(phid=device.phid_bk).first()
+        ):
+            placeholder.phid = device.phid_bk
+
         db.session.add(placeholder)
         db.session.commit()
 

ereuse_devicehub/migrations/versions/6b0880832b78_backup_dhid.py

@@ -0,0 +1,41 @@
+"""backup dhid
+
+Revision ID: 6b0880832b78
+Revises: d7ea9a3b2da1
+Create Date: 2022-09-07 12:53:25.827186
+
+"""
+import citext
+import sqlalchemy as sa
+from alembic import context, op
+
+# revision identifiers, used by Alembic.
+revision = '6b0880832b78'
+down_revision = 'd7ea9a3b2da1'
+branch_labels = None
+depends_on = None
+
+
+def get_inv():
+    INV = context.get_x_argument(as_dictionary=True).get('inventory')
+    if not INV:
+        raise ValueError("Inventory value is not specified")
+    return INV
+
+
+def upgrade():
+    op.add_column(
+        'device',
+        sa.Column('dhid_bk', citext.CIText(), unique=False, nullable=True),
+        schema=f'{get_inv()}',
+    )
+    op.add_column(
+        'device',
+        sa.Column('phid_bk', citext.CIText(), unique=False, nullable=True),
+        schema=f'{get_inv()}',
+    )
+
+
+def downgrade():
+    op.drop_column('device', 'dhid_bk', schema=f'{get_inv()}')
+    op.drop_column('device', 'phid_bk', schema=f'{get_inv()}')

ereuse_devicehub/resources/device/models.py

@@ -173,6 +173,8 @@ class Device(Thing):
         db.CIText(), nullable=True, unique=True, default=create_code
     )
     devicehub_id.comment = "device have a unique code."
+    dhid_bk = db.Column(db.CIText(), nullable=True, unique=False)
+    phid_bk = db.Column(db.CIText(), nullable=True, unique=False)
     active = db.Column(Boolean, default=True)
 
     _NON_PHYSICAL_PROPS = {