Field Default Value

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@default directive, to set a value to null or empty fields.

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Directive @default accepts two arguments:

  1. value: the default value, from any scalar type (string, boolean, integer, float or ID).
  2. condition: if the field must be null or empty, via enum values IS_NULL or IS_EMPTY. By default it is null.

In the example below, when a post does not have a featured image, field featuredImage returns null:

{
post(by: { id: 1 }) {
featuredImage {
id
src
}
}
}
{
"data": {
"post": {
"featuredImage": null
}
}
}

By using @default, we can then retrieve some default image:

{
post(by: { id: 1 }) {
featuredImage @default(value: 55) {
id
src
}
}
}
{
"data": {
"post": {
"featuredImage": {
"id": 55,
"src": "http://mysite.com/wp-content/uploads/my-default-image.png"
}
}
}
}

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