Request Syntax URI Request Parameters Request Body Response Syntax Response Elements Errors See Also

GetPersonalizedRanking

Re-ranks a list of recommended items for the given user. The first item in the list is deemed the most likely item to be of interest to the user.

Note

The solution backing the campaign must have been created using a recipe of type PERSONALIZED_RANKING.

Request Syntax


POST /personalize-ranking HTTP/1.1
Content-type: application/json

{
   "campaignArn": "string",
   "context": { 
      "string" : "string" 
   },
   "filterArn": "string",
   "filterValues": { 
      "string" : "string" 
   },
   "inputList": [ "string" ],
   "metadataColumns": { 
      "string" : [ "string" ]
   },
   "userId": "string"
}

URI Request Parameters

The request does not use any URI parameters.

Request Body

The request accepts the following data in JSON format.

campaignArn

The Amazon Resource Name (ARN) of the campaign to use for generating the personalized ranking.

Type: String

Length Constraints: Maximum length of 256.

Pattern: arn:([a-z\d-]+):personalize:.*:.*:.+

Required: Yes

context

The contextual metadata to use when getting recommendations. Contextual metadata includes any interaction information that might be relevant when getting a user's recommendations, such as the user's current location or device type.

Type: String to string map

Map Entries: Maximum number of 150 items.

Key Length Constraints: Maximum length of 150.

Key Pattern: [A-Za-z\d_]+

Value Length Constraints: Maximum length of 1000.

Required: No

filterArn

The Amazon Resource Name (ARN) of a filter you created to include items or exclude items from recommendations for a given user. For more information, see Filtering Recommendations.

Type: String

Length Constraints: Maximum length of 256.

Pattern: arn:([a-z\d-]+):personalize:.*:.*:.+

Required: No

filterValues

The values to use when filtering recommendations. For each placeholder parameter in your filter expression, provide the parameter name (in matching case) as a key and the filter value(s) as the corresponding value. Separate multiple values for one parameter with a comma.

For filter expressions that use an INCLUDE element to include items, you must provide values for all parameters that are defined in the expression. For filters with expressions that use an EXCLUDE element to exclude items, you can omit the filter-values.In this case, Amazon Personalize doesn't use that portion of the expression to filter recommendations.

For more information, see Filtering Recommendations.

Type: String to string map

Map Entries: Maximum number of 25 items.

Key Length Constraints: Maximum length of 50.

Key Pattern: [A-Za-z0-9_]+

Value Length Constraints: Maximum length of 1000.

Required: No

inputList

A list of items (by itemId) to rank. If an item was not included in the training dataset, the item is appended to the end of the reranked list. If you are including metadata in recommendations, the maximum is 50. Otherwise, the maximum is 500.

Type: Array of strings

Length Constraints: Maximum length of 256.

Required: Yes

metadataColumns

If you enabled metadata in recommendations when you created or updated the campaign, specify metadata columns from your Items dataset to include in the personalized ranking. The map key is ITEMS and the value is a list of column names from your Items dataset. The maximum number of columns you can provide is 10.

For information about enabling metadata for a campaign, see Enabling metadata in recommendations for a campaign.

Type: String to array of strings map

Map Entries: Maximum number of 1 item.

Key Length Constraints: Maximum length of 256.

Array Members: Maximum number of 99 items.

Length Constraints: Maximum length of 150.

Required: No

userId

The user for which you want the campaign to provide a personalized ranking.

Type: String

Length Constraints: Maximum length of 256.

Required: Yes

Response Syntax


HTTP/1.1 200
Content-type: application/json

{
   "personalizedRanking": [ 
      { 
         "itemId": "string",
         "metadata": { 
            "string" : "string" 
         },
         "promotionName": "string",
         "reason": [ "string" ],
         "score": number
      }
   ],
   "recommendationId": "string"
}

Response Elements

If the action is successful, the service sends back an HTTP 200 response.

The following data is returned in JSON format by the service.

personalizedRanking

A list of items in order of most likely interest to the user. The maximum is 500.

Type: Array of PredictedItem objects

recommendationId

The ID of the recommendation.

Type: String

Errors

InvalidInputException

Provide a valid value for the field or parameter.

HTTP Status Code: 400

ResourceNotFoundException

The specified resource does not exist.

HTTP Status Code: 404