---
title: Default values and prefilling
slug: hyper-portal/default-values-and-prefilling
docTags: 
createdAt: 2026-03-27T15:16:30.471Z
---

For definition properties, it is possible to add a **'default value'** or **'prefill data'** when creating the related entity.

:::hint{type="info"}
This feature does not apply when updating an entity, only when creating a new one.
:::

You can read more about this feature [Default values and prefilling](docId\:jAcsII0m_kI8u7toiHC-w).

:::hint{type="success"}
Below is described only what is not available to the public user.
:::

***

## Creating a new entity on the backend side

The public documentation (linked above) states that the 'default value' feature is displayed <u>to the user on the frontend and is also applied by the backend.</u>

If a new entity is created outside the UI, such as through an API, SDK, or migrations, <u>*the backend will also supply default values.*</u>

To avoid applying default values ​​to the properties of a new entity, set the property value to **'null'** in the new entity object.

## How the feature works

By creating an entity on the frontend, we essentially send the entity object we want to add to the backend. <u>From now on, the action of "creating a new entity" will be considered as "sending an entity object to the back end."</u> For each property type, a valid value type is sent.

**An example of a new element where the "default value" will not be applied**

:::CodeblockTabs
An object of a new item

```json
{
   "plainText": "test value",
   "richText": {
      "ops": [
         {
            "insert": "test value"
         }
      ]
   },
   "list": [
      "test value 1",
      "test value 2",
      "test value 3"
   ],
   "date": 1773100800000,
   "file": "test file id",
   "number": 12345,
   "entitySingle": "test entity id",
   "entityList": [
      "test entity id 1",
      "test entity id 2",
      "test entity id 3"
   ],
   "link": {
      "text": "test title",
      "link": "test link value"
   },
   "checkbox": true,
   "phone": "+380999999999",
   "email": "test@test.tt",
   "json": {
      "testProperty": "test value"
   }
}
```
:::

***

In order for a **'default value'** to be applied to a property, you need to specify the value of **'undefined'** for that property in the entity object, or not specify that property in the object at all <u>(equivalent to the value 'undefined')</u>