A minimum of 1 items must be provided for categories

[josephtyler]

When updating a line item, I see a response from the like the following:

{
    "operation_errors": [
        [
            {
                "code": "INVALID_PARAMETER",
                "message": "A minimum of 1 items must be provided for categories",
                "parameter": "categories"
            }
        ]
    ],
    "request": [
        {
            "operation_type": "Update",
            "params": {
                "account_id": "...",
                "bid_amount_local_micro": 290000,
                "bid_type": "MAX",
                "include_sentiment": "ALL",
                "line_item_id": "adagr",
                "name": "...",
                "optimization": "DEFAULT"
            }
        }
    ]
}

Are categories actually required to update a bid on a line item? If this isn't a bug, is there some documentation surrounding this? It appears that categories are not required to be set when working in the web app.

[josephtyler]

Looks like this error may be returned when the placement for a line_item is set to PUBLISHER_NETWORK and a category is not set.

[juanshishido]

Thanks, @josephtyler! I was just going to open an issue for this exact thing.

Repro:

>>> from twitter_ads.client import Client
>>> from twitter_ads.campaign import LineItem
>>> ...
>>> client = Client(CONSUMER_KEY, CONSUMER_SECRET, ACCESS_TOKEN, ACCESS_TOKEN_SECRET)
>>> account = client.accounts(ACCOUNT_ID)
>>> line_item = LineItem(account).load(account, 'a7bs8')
>>> line_item.name
u'Untitled'
>>> line_item.name = 'add a name'
>>> line_item.save()
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/Users/jshishido/.virtualenvs/adsapi/lib/python2.7/site-packages/twitter_ads/resource.py", line 200, in save
    resource, params=self.to_params()).perform()
  File "/Users/jshishido/.virtualenvs/adsapi/lib/python2.7/site-packages/twitter_ads/http.py", line 72, in perform
    raise Error.from_response(response)
twitter_ads.error.BadRequest: <BadRequest object at 0x10f091690 code=400 details=[{u'message': u'A minimum of 1 items must be provided for categories', u'code': u'INVALID_PARAMETER', u'parameter': u'categories'}]>

Looks like this happens because we send all of the line item attributes in the update request and categories is empty:

        response = Request(
            self.account.client, method,
            resource, params=self.to_params()).perform()

resource.py

(Note: this is using twitter-ads 1.2.2, which hasn't yet been updated for v2, which is why we see paused instead of entity_status.)

>>> line_item.to_params()
{  
  'bid_type':u'MAX',
  'name':'add a name',
  'bid_amount_local_micro':10000000,
  'created_at':  u'2017-10-21T15:57:13Z',
  'campaign_id':u'9qpme',
  'bid_unit':u'ENGAGEMENT',
  'updated_at':  u'2017-10-21T16:45:43Z',
  'paused':'true',
  'charge_by':u'ENGAGEMENT',
  'optimization':u'DEFAULT',
  'placements':'TWITTER_TIMELINE',
  'objective':u'TWEET_ENGAGEMENTS',
  'product_type':u'PROMOTED_TWEETS',
  'include_sentiment':u'POSITIVE_ONLY',
  'id':u'a7bs8',
  'categories':''
}

cc: @jbabichjapan, @tushdante

[juanshishido]

Looks like #119 attempts to address this.