# Query similar content via data boolean

**URL:** <https://community.prismic.io/t/query-similar-content-via-data-boolean/5489>\
**Category:** Developing with Prismic\
**Tags:** javascript\
**Created:** [May 24, 2021, 12:08pm UTC](https://community.prismic.io/t/query-similar-content-via-data-boolean/5489 "2021-05-24T12:08:08Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![delon.steph](https://avatars.discourse-cdn.com/v4/letter/d/ed655f/32.png) [@delon.steph](https://community.prismic.io/u/delon.steph)\
**Post date:** [May 24, 2021, 12:08pm UTC](https://community.prismic.io/t/query-similar-content-via-data-boolean/5489/1 "2021-05-24T12:08:08Z")

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Hi there,

In a blog post page, I am trying to query related blog posts based on a boolean (isFest) in my post content type. I wrote the following code, but it won't work, I have this error message instead 'SyntaxError: Unexpected token E in JSON at position 0'.

` const relatedPosts = await Client.query( [Prismic.Predicates.at('my.blog_post.data.isFest', true)] )`

Thanks for your help !

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**Author:** ![Phil](https://dub1.discourse-cdn.com/flex013/user_avatar/community.prismic.io/phil/32/14_2.png) [@Phil](https://community.prismic.io/u/Phil)\
**Post date:** [May 24, 2021, 4:49pm UTC](https://community.prismic.io/t/query-similar-content-via-data-boolean/5489/3 "2021-05-24T16:49:06Z")

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Hi Stephanie,

Welcome to the community!

I think the issue might be that your query should look like this:

```auto
const relatedPosts = await Client.query(Prismic.Predicates.at('my.blog_post.isFest', true))

```

The field must be in the top level of the document and not in a Slice.

Thanks.

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<div class="post-metadata">

**Author:** ![delon.steph](https://avatars.discourse-cdn.com/v4/letter/d/ed655f/32.png) [@delon.steph](https://community.prismic.io/u/delon.steph)\
**Post date:** [May 25, 2021, 5:58am UTC](https://community.prismic.io/t/query-similar-content-via-data-boolean/5489/4 "2021-05-25T05:58:09Z")

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Hi Phil,

Thanks a lot ! Indeed it works now like a charm ! Loving Prismic so far ! This is my first go with it and definitly worth learning 🙂

Thanks again,  
Stephanie

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**Author:** ![system](https://dub1.discourse-cdn.com/flex013/user_avatar/community.prismic.io/system/32/1746_2.png) [@system](https://community.prismic.io/u/system)\
**Post date:** [May 26, 2021, 5:58am UTC](https://community.prismic.io/t/query-similar-content-via-data-boolean/5489/5 "2021-05-26T05:58:12Z")

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<div class="post-metadata">

**Author:** ![system](https://dub1.discourse-cdn.com/flex013/user_avatar/community.prismic.io/system/32/1746_2.png) [@system](https://community.prismic.io/u/system)\
**Post date:** [December 9, 2021, 4:17pm UTC](https://community.prismic.io/t/query-similar-content-via-data-boolean/5489/6 "2021-12-09T16:17:11Z")

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