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Contents
# TODO: directives on fragments: http://facebook.github.io/graphql/#sec-Fragment-Directives
class GraphQL::Query::DirectiveChain
DIRECTIVE_ON = {
GraphQL::Language::Nodes::Field => GraphQL::Directive::ON_FIELD,
GraphQL::Language::Nodes::InlineFragment => GraphQL::Directive::ON_FRAGMENT,
GraphQL::Language::Nodes::FragmentSpread => GraphQL::Directive::ON_FRAGMENT,
}
GET_DIRECTIVES = {
GraphQL::Language::Nodes::Field => Proc.new { |n, f| n.directives },
GraphQL::Language::Nodes::InlineFragment => Proc.new { |n, f| n.directives },
GraphQL::Language::Nodes::FragmentSpread => Proc.new { |n, f| n.directives + f[n.name].directives }, # get directives from definition too
}
attr_reader :result
def initialize(ast_node, query, &block)
directives = query.schema.directives
on_what = DIRECTIVE_ON[ast_node.class]
ast_directives = GET_DIRECTIVES[ast_node.class].call(ast_node, query.fragments)
if contains_skip?(ast_directives)
ast_directives = ast_directives.reject { |ast_directive| ast_directive.name == 'include' }
end
applicable_directives = ast_directives
.map { |ast_directive| [ast_directive, directives[ast_directive.name]] }
.select { |directive_pair| directive_pair.last.on.include?(on_what) }
if applicable_directives.none?
@result = block.call
else
applicable_directives.map do |(ast_directive, directive)|
args = GraphQL::Query::LiteralInput.from_arguments(ast_directive.arguments, directive.arguments, query.variables)
@result = directive.resolve(args, block)
end
@result ||= {}
end
end
private
def contains_skip?(directives)
directives.any? { |directive| directive.name == 'skip' }
end
end
Version data entries
14 entries across 14 versions & 1 rubygems