# Customizing create topic form to add more custom fields, what does add\_to\_serializer or register\_custom\_field\_type do?

**URL:** <https://meta.discourse.org/t/customizing-create-topic-form-to-add-more-custom-fields-what-does-add-to-serializer-or-register-custom-field-type-do/57774>\
**Category:** Extras\
**Created:** [2월 22, 2017, 10:24오전 UTC](https://meta.discourse.org/t/customizing-create-topic-form-to-add-more-custom-fields-what-does-add-to-serializer-or-register-custom-field-type-do/57774 "2017-02-22T10:24:50Z")\
**Posts on this page:** 1\
**Showing post:** 3

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**Author:** ![net\_deamon](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/net_deamon/32/70126_2.png) [@net\_deamon](https://meta.discourse.org/u/net_deamon)\
**Post date:** [2월 23, 2017, 1:47오전 UTC](https://meta.discourse.org/t/customizing-create-topic-form-to-add-more-custom-fields-what-does-add-to-serializer-or-register-custom-field-type-do/57774/3 "2017-02-23T01:47:22Z")

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I can change the height of create post box to include more custom fields.

But I am not able to figure out how to pass the value from custom field to TopicCustomField.  
I tried browsing many plugins of discourse in github. Discourse-tagging ( depreciated) is the closest one that matches. I have posted snippet of that code in the question, … How do we pass the value from handlebar template to discourse topic?

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