Watch a live product demo πŸ‘€ See how Sanity powers richer commerce experiences

Lambda Function - Block at Index 0 is Missing Required _Key

11 replies
Last updated: Feb 25, 2022
Hey guys pretty new to sanity and well web dev in general so I appreciate all the help. I came across this error recently , "Block at index 0 is missing required _key" when trying to push content. I am hoping someone has come across this error before and what to do to fix it.
Feb 25, 2022, 4:25 AM
Thank you for getting back to me Ash, I am posting the data using a lambda function using the API.
Feb 25, 2022, 3:01 PM
Got it. Thanks for the information! Blocks do need a
_key
, but we have a tool that can help here πŸ™‚.
If you you pass your block through the
normalizeBlock
function from Sanity Block Tools, a
_key
will automatically be added to it. That should solve your problem. Let me know how it goes!
Feb 25, 2022, 3:19 PM
Thank you, I will give it a try.
Feb 25, 2022, 3:21 PM
[
  {
    "_key": "e0a05c63270f",
    "_type": "block",
    "children": [
      {
        "_key": "e0a05c63270f0",
        "_type": "span",
        "marks": [],
        "text": "Lets see if this works,"
      }
    ],
    "markDefs": [],
    "style": "normal"
  },
  {
    "_key": "1619a15a5370",
    "_type": "block",
    "children": [
      {
        "_key": "1619a15a53700",
        "_type": "span",
        "marks": [],
        "text": "\n"
      }
    ],
    "markDefs": [],
    "style": "normal"
  },
  {
    "_key": "7d4fa7ec6128",
    "_type": "block",
    "children": [
      {
        "_key": "7d4fa7ec61280",
        "_type": "span",
        "marks": [],
        "text": "please work for the "
      },
      {
        "_key": "7d4fa7ec61281",
        "_type": "span",
        "marks": [
          "strong"
        ],
        "text": "love of god"
      }
    ],
    "markDefs": [],
    "style": "normal"
  }
]
Invalid block value

Block at index 0 is missing required _key.
Feb 25, 2022, 3:31 PM
[
  {
    "_key": "e0a05c63270f",
    "_type": "block",
    "children": [
      {
        "_key": "e0a05c63270f0",
        "_type": "span",
        "marks": [],
        "text": "Lets see if this works,"
      }
    ],
    "markDefs": [],
    "style": "normal"
  },
  {
    "_key": "1619a15a5370",
    "_type": "block",
    "children": [
      {
        "_key": "1619a15a53700",
        "_type": "span",
        "marks": [],
        "text": "\n"
      }
    ],
    "markDefs": [],
    "style": "normal"
  },
  {
    "_key": "7d4fa7ec6128",
    "_type": "block",
    "children": [
      {
        "_key": "7d4fa7ec61280",
        "_type": "span",
        "marks": [],
        "text": "please work for the "
      },
      {
        "_key": "7d4fa7ec61281",
        "_type": "span",
        "marks": [
          "strong"
        ],
        "text": "love of god"
      }
    ],
    "markDefs": [],
    "style": "normal"
  }
]
Invalid block value

Block at index 0 is missing required _key.
Feb 25, 2022, 3:31 PM
I am still getting the same error πŸ˜…
Feb 25, 2022, 3:32 PM
Hmm. Just to double check, are you certain that's the data you're sending to the API?
I added that exact data to a Portable Text field, and it seems to work for me
πŸ™‚.
Feb 25, 2022, 3:42 PM
So apparently, I was sending in an array instead of an object, Well I feel stupid lol πŸ˜…. Thank you so much for your help
user E
. It works now.
Feb 25, 2022, 3:46 PM
So apparently, I was sending in an array instead of an object, Well I feel stupid lol πŸ˜…. Thank you so much for your help
user E
. It works now.
Feb 25, 2022, 3:46 PM
No worries at all, and that's certainly not a stupid mistake πŸ™‚. I'm glad you got it sorted!
Feb 25, 2022, 3:48 PM
So apparently, I was sending in an array instead of an object, Well I feel stupid lol πŸ˜…. Thank you so much for your help
user E
. It works now.
Feb 25, 2022, 3:46 PM

Sanity– build remarkable experiences at scale

The Sanity Composable Content Cloud is the modern headless CMS that treats content as data to power your digital business. Free to get started, and pay-as-you-go on all plans.

Categorized in

Related answers

Get more help in the community Slack

TopicCategoriesFeaturedRepliesLast Updated
After adding the subtitle and running this code npm run graphql-deploy It does nothingSep 15, 2020
how to limit a reference to just one entry in Studio reference input side versus the default as-many-entries-as-you-fill-in-an-array...Sep 18, 2020
Is it possible to fetch more than one "_type" using GROQ?Nov 2, 2020
I want to add a view with the Structure builder (S.view.component) where I list similar documents based on the title. What...Sep 23, 2020
Is there a structure builder example where the format of each preview for the document list is modified?Feb 3, 2021
I have an array of references to a country schema type but it always just returns NULL values for meJan 30, 2021
Hi, I need help with a query for getting the url of an image asset. Here is what I've been trying, but I only get the _ref...Dec 1, 2020
Sanity UI looks brilliant :smiley: Is something like the current date picker possible at the moment? I’m not sure if anicon...Dec 21, 2020
Hey everyone. I have been coding and may have potentially accidentally deleted something. Does anyone know how to resolve...Dec 26, 2020
Hello everyone and happy new year :raised_hands::skin-tone-2:, I have a problem with outputting Portable Text :disappointed:...Jan 1, 2021

Related contributions

Clean Next.js + Sanity app
- Template

Official(made by Sanity team)

A clean example of Next.js with embedded Sanity ready for recomposition.

Cody Olsen
Go to Clean Next.js + Sanity app

Blog with Built-in Content Editing
- Template

Official(made by Sanity team)

A Sanity-powered blog with built-in content editing and instant previews.

Go to Blog with Built-in Content Editing