Pagination information (next, prev, first, last) is included in the Link
HTTP header.
The total number of entries is provided in the X-Total-Count HTTP
header.

gateway tag shall be admin_only

Only keep the values really required by the application.

Fix failure for ajax request GET /inventory/_retrieve_items?draw=7&columns...:
invalid request block size: 5574 (max 4096)...skip
	# Please enter the commit message for your changes. Lines starting

Sorting on manufacturer/model/location/status requires
a join which removes the row with empty field.
Disable it until we find a way to sort properly including null values.

When there are more than a 1000 items in the table, retrieving and
displaying all items takes about 7 seconds.
This is every time we refresh the items page, which is too slow.

Some tags (like gateway) should only be selectable by admin users.

- The query to retrieve used ICS ids was run at each iteration of the
  loop...
- Use a set to quickly test the existence of used ICS ids

Enable to run the application closer to the production environment

Having the description field only on the Model class makes things
inconsistent.
It's nice to have a description on other attributes as well.

The generation of the QR code image is quite slow and makes the page
displaying them take a long time to load when it includes more a few.
The data never changes and can easily be cached (the repr() of the class
is used in the cache key, so if the name or id changes, the cache will
be recomputed - there is no need for a timeout).

Column not visible but searchable.
Allow to search comments and TAG number for items imported from JIRA.

One should be able to enter a MAC when creating/editing an interface.

See https://github.com/showdownjs/showdown/wiki/Extensions

Allow to scan a label to enter an ICS id via the web interface

The user_id is used to track the item creator. It's not supposed to be
updated afterwards. There is no need to track changes.

uwsgi is used to run the application in production.
It was lost during some environment updates...

Strings are automatically converted to datetime object.
Note that datetime are stored without timezone in the database (in UTC).

text is really generic and could conflict with another variable.
body is often used for comments.

Required to create users when importing items from JIRA.

Renamed blueprint from "users" to "user" to be consistent with other
blueprints (inventory and network).

+ fix tests

This allows to easily register items via the API without giving an ICS
id.

Split API in different blueprints like for the web UI:
- users (login)
- inventory
- network

Use version in API url (api/v1) to make future changes easier without
breaking backward compatibility

- This will help tracking who and what was created / changed
- Move fetch_current_user_id to utils.py
- Make ItemComment inherit from CreatedMixin

- Only admin should be able to create networks
- Deleting an interface should require at least create group (should
  that be restricted to admin?)

Add delete and delete-orphan options to the cascade behavior:
- delete: delete from database associated cnames when deleting an
  interface
- delete-orphan: delete cname when removing it from the list of
  interface.cnames