---
title: "CustomFieldType"
generated: true
---
<GenerationInfo sourceFile="packages/common/src/shared-types.ts" sourceLine="104" packageName="@vendure/common" />

A data type for a custom field. The CustomFieldType determines the data types used in the generated
database columns and GraphQL fields as follows (key: m = MySQL, p = Postgres, s = SQLite):

Type         | DB type                               | GraphQL type
-----        |---------                              |---------------
string       | varchar                               | String
localeString | varchar                               | String
text         | longtext(m), text(p,s)                | String
localeText   | longtext(m), text(p,s)                | String
int          | int                                   | Int
float        | double precision                      | Float
boolean      | tinyint (m), bool (p), boolean (s)    | Boolean
datetime     | datetime (m,s), timestamp (p)         | DateTime
struct       | json (m), jsonb (p), text (s)         | JSON
relation     | many-to-one / many-to-many relation   | As specified in config

Additionally, the CustomFieldType also dictates which [configuration options](/guides/developer-guide/custom-fields/#custom-field-config-properties)
are available for that custom field.

```ts title="Signature"
type CustomFieldType = | 'string'
    | 'localeString'
    | 'int'
    | 'float'
    | 'boolean'
    | 'datetime'
    | 'relation'
    | 'text'
    | 'localeText'
    | 'struct'
```
