# Category custom field value strage behaviour in category edit form
**URL:** https://meta.discourse.org/t/category-custom-field-value-strage-behaviour-in-category-edit-form/55807
**Category:** Development
**Created:** [1월 15, 2017, 4:43오후 UTC](https://meta.discourse.org/t/category-custom-field-value-strage-behaviour-in-category-edit-form/55807 "2017-01-15T16:43:46Z")
**Posts on this page:** 4
**Page:** 1
I’m about to create a plugin adding a checkbox to Category settings. All is fine with the field until I uncheck the field. In database I can see that value of custom field is set to “false” but as I reopen category settings the checkbox is now checked although the value is still false. Is there something I’m missing?
Here’s the custom field…
**~/bump-topic/assets/javascripts/discourse/pre-initializers/extend-for-bumping.js.es6**
```plaintext
import Category from 'discourse/models/category';
import computed from 'ember-addons/ember-computed-decorators';
export default {
name: 'extend-for-bumping',
before: 'inject-discourse-objects',
initialize() {
Category.reopen({
@computed('custom_fields.enable_bump_topic')
enable_bump_topic: {
get(value) {
return value === "true";
},
set(value) {
value = value ? "true" : "false";
this.set("custom_fields.enable_bump_topic", value);
return value;
}
}
});
}
};
```
And the interface part…
**~/bump-topic/assets/javascripts/discourse/templates/connectors/category-custom-settings/bump-topic.hbs**
```plaintext
{{#if this.siteSettings.bump_topic_enabled}}
I have a question.
what should we do for adding a custom field to a category?
1.Using plugin.rb:
`Category.register_custom_field_type('tracking_number', :integer)`
2.using the code above.
Which one should we use?
---
Began writing the plugin, used the 2 files and they work.
The hardest part for me to understand how this field should be used further.
```
import property from 'ember-addons/ember-computed-decorators';
import Category from 'discourse/models/category';
export default {
name: 'extend-category-for-temp',
before: 'inject-discourse-objects',
initialize() {
Category.reopen({
@property('custom_fields.enable_topic_temp')
enable_topic_temp: {
get(enableField) {
return enableField === "true";
},
set(value) {
value = value ? "true" : "false";
this.set("custom_fields.enable_topic_temp", value);
return value;
}
}
});
}
};
```
and
```
I’m not sure what’s a question here? … In case you would like a showcase, I managed to complete my plugin and it’s available at:
[https://github.com/jannolii/discourse-bump-topic](https://github.com/jannolii/discourse-bump-topic)
Maybe you can get ideas from my code 🙂