How can I return an array in GraphQL if I don't know how many there are (PHP, rebing/graphql-laravel)

Question

There is a JSON array:

[{
   "src":{
      "hd":"1.jpeg",
      "small":"2.jpeg"
   }},
{
   "src":{
      "hd":"1.jpeg",
      "small":"2.jpeg"
   }
}]

How do I get the list through GraphQL? I don't know how many elements there are.

I can get a one dimensional array with pictures:

$pictures = new ObjectType(
    [
        'name' => 'pictures',
        'fields' => [
            'small' => [
                'type' => Type::string(),
            ],
            'hd' => [
                'type' => Type::string(),
            ],
        ]
    ]
);

return [
    ......
    'image' => [
    'type' => $pictures,
    'is_relation' => false,
    'resolve' => function ($content) {
        return $content->image[0]; // I return one here, but I need a list
    },
],
......

But how can I get an array of pictures if I don't know how many there are? Maybe one picture, maybe 10. Googled for half a day, found information that GraphQL can return only what is hardcoded... Is it so?

question from:https://stackoverflow.com/questions/65918881/how-can-i-return-an-array-in-graphql-if-i-dont-know-how-many-there-are-php-re

Answer 1

It is not necessary to know the number of images.

It seems that you need to define the Type of the field images correctly.

GraphQL know custom types and primitives.

type Image{
  name: String!
  small: String!
}

Image is a custom type, String is a primitive or basic type.

What you are probabably missing is, that you can have a list of a certain type.

I don't know your GQL framework, but here is an example:

Line 23:

• https://github.com/rebing/graphql-laravel/blob/master/example/Query/UsersQuery.php

Look at Type::listOf()

So, what you will need to do:

• define an ObjectType for a single Image (your current $images type)
• And then have a field images in your schema defined as return type list of image

Then you can resolve with return $content->image instead of return $content->image[0]