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microfiber

A library to query and manipulate GraphQL Introspection Query results in some useful ways.

  • 1.3.0
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Microfiber - A.K.A. GraphQL Introspection Tools

npm downloads

A library to query and manipulate GraphQL Introspection Query results in some useful ways. What ways you ask?

How about:

  • Digging through your Introspection Query Results for a specific Query, Mutation, Type, Field, Argument or Subscription.
  • Removing a specific Query, Mutation, Type, Field/InputField, Argument or Subscription from your Introspection Query Results.
  • Removing Queries, Mutations, Fields/InputFields or Arguments that refer to Type that does not exist in - or has been removed from - your Introspection Query Results.

Yay!

It's called microfiber because it is heavily used to do the cleaning and manipulation in SpectaQL...it cleans the spectacles, get it?!

But, we also wanted to have a more intuitive, literal name so that people could find it. Hence it's also known as @anvilco/graphql-introspection-tools.


Repository sponsored by Anvil

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Learn more on our Anvil developer page.


Getting Started

  1. Install microfiber
npm install microfiber
# OR
yarn add microfiber
  1. Clean your GraphQL Introspection Query Results
import { Microfiber } from 'microfiber'

const introspectionQueryResults = {...}

const microfiber = new Microfiber(introspectionQueryResults)

// ...do some things to your schema with `microfiber`

const cleanedIntrospectonQueryResults = microfiber.getResponse()

// ...do something with your cleaned Introspection Query Results.

Usage

class Microfiber

Most of the useful stuff in this library is done through creating a new Microfiber class instance with your Introspection Query Results, and querying or manipulating it via that instance. Here are most of the interesting bits to know about class behavior.


constructor
const introspectionQueryResponse = {...}
// Here are the publicly supported options and their sane defaults:
const options = {
  // Some GraphQL implementations have non-standard Query, Mutation and/or Subscription
  // type names. This option will fix them if they're messed up in the Introspection Query
  // Results
  fixQueryAndMutationAndSubscriptionTypes: true,

  // Remove Types that are not referenced anywhere by anything
  removeUnusedTypes: true,

  // Remove things whose Types are not found due to being removed
  removeFieldsWithMissingTypes: true,
  removeArgsWithMissingTypes: true,
  removeInputFieldsWithMissingTypes: true,
  removePossibleTypesOfMissingTypes: true,

  // Remove all the types and things that are unreferenced immediately?
  cleanupSchemaImmediately: true,  
}

const microfiber = new Microfiber(introspectionQueryResponse, options)

cleanSchema

Clean up the schema by removing:

  • Fields or Input Fields whose Type does not exist in the schema.
  • Args whose Type does not exist in the schema.
  • Possible Types in a Union that do not exist in the schema.
  • Queries or Mutations whose return Type does not exist in the schema.

This method is usually called after altering the schema in any way so as to not leave any dangling/orphaned things around the schema.

microfiber.cleanSchema()

getResponse

Get out the Introspection Query Result that you have manipulated with Microfiber as an Object.

const cleanedResponse = microfiber.getResponse()

getAllTypes

Get all the Types from your schema as an Array of Objects. Supported options and their sane defaults are shown.

const allTypes = microfiber.getAllTypes({
  // Include reserved GraphQL types?
  includeReserved: false,
  // Include the Query type?
  includeQuery: false,
  // Include the Mutation type?
  includeMutation: false,
  // Include the Subscription type?
  includeSubscription: false,
} = {})

getType

Get a specific Type from your schema. Supported params and their sane defaults are shown.

const type = microfiber.getType({ kind: 'OBJECT', name })

getDirectives

Get all the Directives from your schema.

const directives = microfiber.getDirectives()

getDirective

Get a specific Directive from your schema. Supported params and their sane defaults are shown.

const directive = microfiber.getDirective({ name })

getQueryType

Get the Query Type from your schema.

const queryType = microfiber.getQueryType()

getQuery

Get a specific Query from your schema.

const query = microfiber.getQuery({ name })

getMutationType

Get the Mutation Type from your schema.

const mutationType = microfiber.getMutationType()

getMutation

Get a specific Mutation from your schema.

const mutation = microfiber.getMutation({ name })

getSubscriptionType

Get the Subscription Type from your schema.

const subscriptionType = microfiber.getSubscription()

getSubscription

Get a specific Subscription from your schema.

const subscription = microfiber.getSubscription({ name })

getField

Get a specific Field from your schema. Supported params and their sane defaults are shown.

const field = microfiber.getField({ typeKind: 'OBJECT', typeName, fieldName })

getInterfaceField

Get a specific Field from an Interface in your schema. A convenience wrapper around getField({ typeKind: 'INTERFACE', ...})

const interfaceField = microfiber.getInterfaceField({ typeName, fieldName })

getInputField

Get a specific InputField from your schema. A convenience wrapper around getField({ typeKind: 'INPUT_OBJECT', ...})

const inputField = microfiber.getInputField({ typeName, fieldName })

getArg

Get a specific Arg from your schema. Supported params and their sane defaults are shown.

const arg = microfiber.getArg({ typeKind: 'OBJECT', typeName, fieldName, argName })

getDirectiveArg

Get a specific Arg from a specifig Directive in your schema. Supported params and their sane defaults are shown.

const directiveArg = microfiber.getDirectiveArg({ directiveName, argName })

removeDirective

Get a specific Directive from your schema. Supported params and their sane defaults are shown.

const directiveArg = microfiber.removeDirective({
  name,
  // Clean up the schema afterwards?
  cleanup = true,
})

removeType

Remove a Type from your schema, and optionally the references to that Type elsewhere in your schema. Supported params and their sane defaults are shown.

microfiber.removeType({
  kind: 'OBJECT',
  name,
  // Clean up the schema afterwards?
  cleanup: true,
  // Remove occurances of this Type from other places?
  removeFieldsOfType: constructorOptions.removeFieldsWithMissingTypes,
  removeInputFieldsOfType: constructorOptions.removeInputFieldsWithMissingTypes,
  removePossibleTypesOfType: constructorOptions.removePossibleTypesOfMissingTypes,
  removeArgsOfType: constructorOptions.removeArgsWithMissingTypes,
})

removeField

Remove a specific Field from a specific Type in your schema. Supported params and their sane defaults are shown.

microfiber.removeField({
  typeKind: 'OBJECT',
  typeName,
  fieldName,
  // Clean up the schema afterwards?
  cleanup: true,
})

removeInputField

Remove a specific Input Field from a specific Input Object in your schema. Supported params and their sane defaults are shown.

microfiber.removeInputField({
  typeName,
  fieldName,
  // Clean up the schema afterwards?
  cleanup: true,
})

removeArg

Remove a specific Arg from a specific Field or Input Field in your schema. Supported params and their sane defaults are shown.

microfiber.removeArg({
  typeKind,
  typeName,
  fieldName,
  argName,
  // Clean up the schema afterwards?
  cleanup: true,
})

removeEnumValue

Remove a specifc Enum value from an Enum Type in your schema. Supported params are shown.

microfiber.removeEnumValue({
  // The name of the Enum Type
  name,
  // The Enum value you want to remove
  value,
})

removePossibleType

Remove a Possible Type from a specific Union Type in your schema. Supported params and sane defaults are shown.

microfiber.removePossibleType({
  // The name of the Union Type
  typeName,
  // The Kind of the possible Type you want to remove
  possibleTypeKind,
  // The name of the possible Type you want to remove
  possibleTypeName,
  // Clean up the schema afterwards?
  cleanup: true,
})

removeQuery

Remove a specific Query from your schema. Supported params and their sane defaults are shown.

microfiber.removeQuery({
  name,
  // Clean up the schema afterwards?
  cleanup: true,
})

removeMutation

Remove a specific Mutation from your schema. Supported params and their sane defaults are shown.

microfiber.removeMutation({
  name,
  // Clean up the schema afterwards?
  cleanup: true,
})

removeSubscription

Remove a specific Subscription from your schema. Supported params and their sane defaults are shown.

microfiber.removeSubscription({
  name,
  // Clean up the schema afterwards?
  cleanup: true,
})

Other exports from this library

There are some other exports from this library, not just the Microfiber class.


KINDS

An Object containing all the GraphQL Kind values you may encounter.

import { KINDS } from 'microfiber'

console.log(KINDS)

// {
//   SCALAR: 'SCALAR',
//   OBJECT: 'OBJECT',
//   INTERFACE: 'INTERFACE',
//   UNION: 'UNION',
//   ENUM: 'ENUM',
//   INPUT_OBJECT: 'INPUT_OBJECT',
//   LIST: 'LIST',
//   NON_NULL: 'NON_NULL'
// }

typesAreSame

A function that compares 2 types and determines if they have the same Kind and Name.

import { typesAreSame } from 'microfiber'

const typeA = { kind: 'OBJECT', name: 'Foo' }
const typeB = { kind: 'OBJECT', name: 'Bar' }

typesAreSame(typeA, typeB) // false
typesAreSame(typeA, typeA) // true

digUnderlyingType

A function that digs through any Non-Null and List nesting and returns the underlying Type.

import { digUnderlyingType } from 'microfiber'

const nonNullableString = {
  name: null,
  kind: 'NON_NULL',
  ofType: {
    name: null,
    kind: 'LIST',
    ofType: {
      name: 'String',
      kind: 'SCALAR',
    }
  }
}

digUnderlyingType(nonNullableString) // { name: 'String', kind: 'SCALAR' }

isReservedType

A function that returns a Boolean indicating whether a Type is special GraphQL reserved Type.

import { isReservedType } from 'microfiber'

const myType = { name: 'Foo', ... }
const reservedType = { name: '__Foo', ... }

isReservedType(myType) // false
isReservedType(reservedType) // true

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Package last updated on 27 Jul 2022

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