delete tags named

ereuse_devicehub/resources/tag/model.py

@@ -125,6 +125,19 @@ class Tag(Thing):
         """Return a SQLAlchemy filter expression for printable queries."""
         return cls.org_id == Organization.get_default_org_id()
 
+    def delete(self):
+        """Deletes the tag.
+
+        This method removes the tag if is named tag and don't have any linked device.
+        """
+        if self.device:
+            raise TagLinked(self)
+        if self.provider:
+            # if is an unnamed tag not delete
+            raise TagUnnamed(self.id)
+
+        db.session.delete(self)
+
     def __repr__(self) -> str:
         return '<Tag {0.id} org:{0.org_id} device:{0.device_id}>'.format(self)
 
@@ -133,3 +146,15 @@ class Tag(Thing):
 
     def __format__(self, format_spec: str) -> str:
         return '{0.org.name} {0.id}'.format(self)
+
+
+class TagLinked(ValidationError):
+    def __init__(self, tag):
+        message = 'The tag {} is linked to device {}.'.format(tag.id, tag.device.id)
+        super().__init__(message, field_names=['device'])
+
+        
+class TagUnnamed(ValidationError):
+    def __init__(self, id):
+        message = 'This tag {} is unnamed tag. It is imposible delete.'.format(id)
+        super().__init__(message, field_names=['device'])

ereuse_devicehub/resources/tag/view.py

@@ -60,6 +60,14 @@ class TagView(View):
         db.session.commit()
         return Response(status=201)
 
+    @auth.Auth.requires_auth
+    def delete(self, id):
+        tag = Tag.from_an_id(id).filter_by(owner=g.user).one()
+        tag.delete()
+        db.session().final_flush()
+        db.session.commit()
+        return Response(status=204)
+
 
 class TagDeviceView(View):
     """Endpoints to work with the device of the tag; /tags/23/device."""

tests/test_tag.py

@@ -35,6 +35,49 @@ def test_create_tag(user: UserClient):
     assert tag.provider == URL('http://foo.bar')
 
 
+@pytest.mark.mvp
+@pytest.mark.usefixtures(conftest.app_context.__name__)
+def test_delete_tags(user: UserClient, client: Client):
+    """Delete a named tag."""
+    # Delete Tag Named
+    # import pdb; pdb.set_trace()
+    pc = Desktop(serial_number='sn1', chassis=ComputerChassis.Tower, owner_id=user.user['id'])
+    db.session.add(pc)
+    db.session.commit()
+    tag = Tag(id='bar', owner_id=user.user['id'], device_id=pc.id)
+    db.session.add(tag)
+    db.session.commit()
+    tag = Tag.query.one()
+    assert tag.id == 'bar'
+    # Is not possible delete one tag linked to one device
+    res, _ = user.delete(res=Tag, item=tag.id, status=422)
+    msg = 'The tag bar is linked to device'
+    assert msg in res['message'][0]
+
+    tag.device_id = None
+    db.session.add(tag)
+    db.session.commit()
+    # Is not possible delete one tag from an anonymous user
+    client.delete(res=Tag, item=tag.id, status=401)
+
+    # Is possible delete one normal tag
+    user.delete(res=Tag, item=tag.id)
+    user.get(res=Tag, item=tag.id, status=404)
+
+    # Delete Tag UnNamed
+    org = Organization(name='bar', tax_id='bartax')
+    tag = Tag(id='bar-1', org=org, provider=URL('http://foo.bar'), owner_id=user.user['id'])
+    db.session.add(tag)
+    db.session.commit()
+    tag = Tag.query.one()
+    assert tag.id == 'bar-1'
+    res, _ = user.delete(res=Tag, item=tag.id, status=422)
+    msg = 'This tag {} is unnamed tag. It is imposible delete.'.format(tag.id)
+    assert msg in res['message']
+    tag = Tag.query.one()
+    assert tag.id == 'bar-1'
+
+
 @pytest.mark.mvp
 @pytest.mark.usefixtures(conftest.app_context.__name__)
 def test_create_tag_default_org(user: UserClient):