Class: GraphQL::Schema::Visibility::Migration

Inherits:
Profile
  • Object
show all
Defined in:
lib/graphql/schema/visibility/migration.rb

Overview

You can use this to see how Warden and Profile handle .visible? differently in your schema.

It runs the same method on both implementations and raises an error when the results diverge.

To fix the error, modify your schema so that both implementations return the same thing. Or, open an issue on GitHub to discuss the difference.

This plugin adds overhead to runtime and may cause unexpected crashes – don’t use it in production!

This plugin adds two keys to context when running:

  • visibility_migration_running: true
  • For the Warden which it instantiates, it adds visibility_migration_warden_running: true.

Use those keys to modify your visible? behavior as needed.

Also, in a pinch, you can set skip_visibility_migration_error: true in context to turn off this behavior per-query. (In that case, it uses Profile directly.)

Examples:

Adding this plugin


use GraphQL::Schema::Visibility, migration_errors: true

Defined Under Namespace

Classes: RuntimeTypesMismatchError

Constant Summary collapse

PUBLIC_PROFILE_METHODS = 
[
  :enum_values,
  :interfaces,
  :all_types,
  :all_types_h,
  :fields,
  :loadable?,
  :type,
  :arguments,
  :argument,
  :directive_exists?,
  :directives,
  :field,
  :query_root,
  :mutation_root,
  :possible_types,
  :subscription_root,
  :reachable_type?
]

Instance Attribute Summary

Attributes inherited from Profile

#name

Instance Method Summary collapse

Methods inherited from Profile

#all_types, #all_types_h, #argument, #arguments, #directive_exists?, #directives, #enum_values, #field, #field_on_visible_interface?, #fields, from_context, #interfaces, #loadable?, #mutation_root, pass_thru, #possible_types, #query_root, #reachable_type?, #subscription_root, #type

Constructor Details

#initialize(context:, schema:, name: nil) ⇒ Migration

Returns a new instance of Migration.



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# File 'lib/graphql/schema/visibility/migration.rb', line 79

def initialize(context:, schema:, name: nil)
  @name = name
  @skip_error = context[:skip_visibility_migration_error] || context.is_a?(Query::NullContext) || context.is_a?(Hash)
  @profile_types = GraphQL::Schema::Visibility::Profile.new(context: context, schema: schema)
  if !@skip_error
    context[:visibility_migration_running] = true
    warden_ctx_vals = context.to_h.dup
    warden_ctx_vals[:visibility_migration_warden_running] = true
    if schema.const_defined?(:WardenCompatSchema, false) # don't use a defn from a superclass
      warden_schema = schema.const_get(:WardenCompatSchema, false)
    else
      warden_schema = Class.new(schema)
      warden_schema.use_visibility_profile = false
      # TODO public API
      warden_schema.send(:add_type_and_traverse, [warden_schema.query, warden_schema.mutation, warden_schema.subscription].compact, root: true)
      warden_schema.send(:add_type_and_traverse, warden_schema.directives.values + warden_schema.orphan_types, root: false)
      schema.const_set(:WardenCompatSchema, warden_schema)
    end
    warden_ctx = GraphQL::Query::Context.new(query: context.query, values: warden_ctx_vals)
    warden_ctx.warden = GraphQL::Schema::Warden.new(schema: warden_schema, context: warden_ctx)
    warden_ctx.warden.skip_warning = true
    warden_ctx.types = @warden_types = warden_ctx.warden.visibility_profile
  end
end

Instance Method Details

#call_method_and_compare(method, args) ⇒ Object 



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# File 'lib/graphql/schema/visibility/migration.rb', line 134

def call_method_and_compare(method, args)
  res_1 = @profile_types.public_send(method, *args)
  if @skip_error
    return res_1
  end

  res_2 = @warden_types.public_send(method, *args)
  normalized_res_1 = res_1.is_a?(Array) ? Set.new(res_1) : res_1
  normalized_res_2 = res_2.is_a?(Array) ? Set.new(res_2) : res_2
  if !equivalent_schema_members?(normalized_res_1, normalized_res_2)
    # Raise the errors with the orignally returned values:
    err = RuntimeTypesMismatchError.new(method, res_2, res_1, args)
    raise err
  else
    res_1
  end
end

#equivalent_schema_members?(member1, member2) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/graphql/schema/visibility/migration.rb', line 152

def equivalent_schema_members?(member1, member2)
  if member1.class != member2.class
    return false
  end

  case member1
  when Set
    member1_array = member1.to_a.sort_by(&:graphql_name)
    member2_array = member2.to_a.sort_by(&:graphql_name)
    member1_array.each_with_index do |inner_member1, idx|
      inner_member2 = member2_array[idx]
      equivalent_schema_members?(inner_member1, inner_member2)
    end
  when GraphQL::Schema::Field
    member1.ensure_loaded
    member2.ensure_loaded
    if member1.introspection? && member2.introspection?
      member1.inspect == member2.inspect
    else
      member1 == member2
    end
  when Module
    if member1.introspection? && member2.introspection?
      member1.graphql_name == member2.graphql_name
    else
      member1 == member2
    end
  else
    member1 == member2
  end
end

#loaded_types ⇒ Object 



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# File 'lib/graphql/schema/visibility/migration.rb', line 104

def loaded_types
  @profile_types.loaded_types
end