字符串索引必须是整数aws lambda api

Question

def lambda_handler(event, context):
    "idsA=event['items'][0]['ids']"

When i want call with Python the JSON object items which contains arrays ids.. in aws lambda, from API, It returns this error:

"string indices must be integers"`

I think the problem can be in COnfigure test event :

{
  "ids": "ids",
  "contents": "contents",
  "ResultID": "ResultID",
  "QueryID": "QueryID",
   "nR": "nR",
   "items": "ids"     


}

or in API getaaway in JSON body mapping template:

{
    "items": [
    #foreach($elem in $input.params('items').split(','))
        {
            "ids": "$elem.ids",
            "contents": "$elem.contents"
        }#if($foreach.hasNext),#end
    #end
    ],
    "QueryID": "$input.params('QueryID')",
    "nR": "$input.params('nR')"
}

Answer 1

It sounds like in your test event items is supposed to be a JSON array of objects:

{
    "ResultID": "ResultID",
     "QueryID": "QueryID",
     "nR": "nR",
     "items": [
         {
             "ids": [1, 2, 3],
              "contents": ["content1", "content2"]
         }
    ]
}

... but I think there may be a template mapping issue here as well. What does a raw request to API gateway look like?