module GraphQL::Client::DefinitionVariables
Internal: Detect variables used in a definition.
Public Class Methods
operation_variables(schema, document, definition_name = nil)
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Internal: Detect all variables used in a given operation or fragment definition.
schema - A GraphQL::Schema document - A GraphQL::Language::Nodes::Document to scan definition_name - A String definition name. Defaults to anonymous definition.
Returns a Hash to VariableDefinition objects.
# File lib/graphql/client/definition_variables.rb, line 57 def self.operation_variables(schema, document, definition_name = nil) variables(schema, document, definition_name).map { |name, type| GraphQL::Language::Nodes::VariableDefinition.new(name: name.to_s, type: variable_node(type)) } end
variable_node(type)
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Internal: Get AST node for GraphQL
type.
type - A GraphQL::Type
Returns GraphQL::Language::Nodes::Type.
# File lib/graphql/client/definition_variables.rb, line 68 def self.variable_node(type) case type.kind.name when "NON_NULL" GraphQL::Language::Nodes::NonNullType.new(of_type: variable_node(type.of_type)) when "LIST" GraphQL::Language::Nodes::ListType.new(of_type: variable_node(type.of_type)) else GraphQL::Language::Nodes::TypeName.new(name: type.graphql_name) end end
variables(schema, document, definition_name = nil)
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Internal: Detect all variables used in a given operation or fragment definition.
schema - A GraphQL::Schema document - A GraphQL::Language::Nodes::Document to scan definition_name - A String definition name. Defaults to anonymous definition.
Returns a Hash to GraphQL::Type objects.
# File lib/graphql/client/definition_variables.rb, line 16 def self.variables(schema, document, definition_name = nil) unless schema.is_a?(GraphQL::Schema) || (schema.is_a?(Class) && schema < GraphQL::Schema) raise TypeError, "expected schema to be a GraphQL::Schema, but was #{schema.class}" end unless document.is_a?(GraphQL::Language::Nodes::Document) raise TypeError, "expected document to be a GraphQL::Language::Nodes::Document, but was #{document.class}" end sliced_document = GraphQL::Language::DefinitionSlice.slice(document, definition_name) visitor = GraphQL::Language::Visitor.new(sliced_document) type_stack = GraphQL::StaticValidation::TypeStack.new(schema, visitor) variables = {} visitor[GraphQL::Language::Nodes::VariableIdentifier] << ->(node, parent) do if definition = type_stack.argument_definitions.last existing_type = variables[node.name.to_sym] if existing_type && existing_type.unwrap != definition.type.unwrap raise GraphQL::Client::ValidationError, "$#{node.name} was already declared as #{existing_type.unwrap}, but was #{definition.type.unwrap}" elsif !(existing_type && existing_type.kind.non_null?) variables[node.name.to_sym] = definition.type end end end visitor.visit variables end