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[PanFengyun <fengyun.pan@xxxxxxxxxxxx>]

** Changed in: nova
       Status: In Progress => Invalid

** Changed in: nova
       Status: Invalid => New

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https://bugs.launchpad.net/bugs/1591434

Title:
  get 'itemNotFound' when flavor-show  flavor_name

Status in OpenStack Compute (nova):
  New

Bug description:
  when I use 'flavor-show' to get detail info of flavor, novaclient get
  "Flavor m1.small could not be found".

  1.create m1.small flavor 
    $ nova flavor-list | grep m1.small
    | 2    | m1.small  | 2048      | 20   | 0         |      | 1     | 1.0         | True      |
  2.get the detail info of m1.small flavor
    nova --debug flavor-show m1.small
    ...
    RESP BODY: {"itemNotFound": {"message": "Flavor m1.small could not be found.", "code": 404}}
    ...
    +----------------------------+----------+
    | Property                   | Value    |
    +----------------------------+----------+
    | OS-FLV-DISABLED:disabled   | False    |
    | OS-FLV-EXT-DATA:ephemeral  | 0        |
    | disk                       | 20       |
    | extra_specs                | {}       |
    | id                         | 2        |
    | name                       | m1.small |
    | os-flavor-access:is_public | True     |
    | ram                        | 2048     |
    | rxtx_factor                | 1.0      |
    | swap                       |          |
    | vcpus                      | 1        |
    +----------------------------+----------+

  reason:
    nova not allow user to get flavor by name. Nova just have get_flavor_by_flavor_id(), and have no get_flavor_by_flavor_name.
  -----
  def show(self, req, id):
          """Return data about the given flavor id."""
          context = req.environ['nova.context']
          try:
              flavor = flavors.get_flavor_by_flavor_id(id, ctxt=context)#just get_flavor_by_flavor_id
              req.cache_db_flavor(flavor)
          except exception.FlavorNotFound as e:
              raise webob.exc.HTTPNotFound(explanation=e.format_message())

          return self._view_builder.show(req, flavor)
  ----- 

  
  helpful: Add get_flavor_by_flavor_name() into show()
  reason:  novaclient just allow user to create flavor by unique id and unique name, so we can get flavor by the id or name. And we can add get_flavor_by_flavor_name().
  -----
  Positional arguments:
    <name>                   Unique name of the new flavor.
    <id>                     Unique ID of the new flavor. Specifying 'auto' will
                             generated a UUID for the ID.
  -----

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