What are custom meta data types?

What are custom meta data types?

A custom metadata type is an object that is used to define the structure for application metadata. The fields of custom metadata types, and the values in the fields, consist only of metadata. The records of custom metadata types are also metadata, not data.

What are custom metadata types Salesforce?

Custom metadata is customizable, deployable, packageable, and upgradeable application metadata. First, you create a custom metadata type, which defines the form of the application metadata. Then you build reusable functionality that determines the behavior based on metadata of that type.

How do I use custom meta data?

To create, go to setup -> Custom Metadata Types and click on new custom metadata types button. Fill required details. Custom metadata type api name ends with “__mdt”. After creating this, you will get an option to create fields, layout and validation rules.

How to declare variables that refer to custom metadata types?

Declaring variables that refer to custom metadata types is similar to what you already do when working in Apex. For example, declare an Apex variable of a custom metadata type like this. Now let’s get the values of a custom field from all the custom metadata records of a certain type.

How to create custom metadata types in Salesforce?

To make the fields on your custom metadata types unique and indexable, mark your fields as Unique and ExternalId. A description of the custom metadata type. This field can contain a maximum of 1,000 characters. Represents one or more custom fields in the custom metadata type. Indicates the gender of the noun that represents the object.

Can you add custom fields to custom metadata?

Customers who install a managed custom metadata type can’t add new custom fields to it. With unpackaged metadata, both developer-controlled and subscriber-controlled access behave the same: like subscriber-controlled access. Refer to Trust, but Verify: Apex Metadata API and Security to learn more.

Can a DML operation be used on custom metadata?

Moreover, DML operations aren’t allowed on custom metadata in the Partner or Enterprise APIs. Customers who install a managed custom metadata type can’t add new custom fields to it. With unpackaged metadata, both developer-controlled and subscriber-controlled access behave the same: like subscriber-controlled access.