Method: GraphQL::Schema#type_error

Defined in:
lib/graphql/schema.rb

#type_error(err, ctx) ⇒ Object

When we encounter a type error during query execution, we call this hook.

You can use this hook to write a log entry, add a ExecutionError to the response (with ctx.add_error) or raise an exception and halt query execution.

Examples:

A nil is encountered by a non-null field

type_error ->(err, query_ctx) {
  err.is_a?(GraphQL::InvalidNullError) # => true
}

An object doesn't resolve to one of a UnionType's members

type_error ->(err, query_ctx) {
  err.is_a?(GraphQL::UnresolvedTypeError) # => true
}

Parameters:

  • err (GraphQL::TypeError) —

    The error encountered during execution

  • ctx (GraphQL::Query::Context) —

    The context for the field where the error occurred

Returns:

  • void

See Also:

  • is the default behavior.


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# File 'lib/graphql/schema.rb', line 459

def type_error(err, ctx)
  @type_error_proc.call(err, ctx)
end