query-complexity-analysis.md

Query Complexity Analysis

This is a PHP port of Query Complexity Analysis in Sangria implementation. Introspection query with description max complexity is 109.

Define your max accepted complexity:

#app/config/config.yml
overblog_graphql:
    security:
        query_max_complexity: 1000

Default value false disabled validation.

Customize your field complexity using config.fields.*.complexity

# src/MyBundle/Resources/config/graphql/Query.types.yml

Query:
    type: object
    config:
        fields:
            droid:
                type: "Droid"
                complexity: '@=1000 + childrenComplexity'
                args:
                    id:
                        description: "id of the droid"
                        type: "String!"
                resolve: "@=query('character_droid', args)"

In the example we add 1000 on the complexity every time using Query.droid field in query. Complexity function signature: function (int $childrenComplexity = 0, array $args = []).