In SDL this is written as follows:. Fields on a GraphQL interface have the same rules as fields on a GraphQL object; their type can be Scalar, Object, Enum, Interface, or Union, or any wrapping type whose base type is one of those five. Uniform mutations: There is one consistent pattern for performing mutations (writes), and it is conceptually baked into the data querying model itself. The CLI then guides you through the default project “Single object with fields (e. Mutations are executed serially. AWS AppSync also makes adding real-time and offline capabilities to your apps pretty easy, and we’ll add a real-time subscription at the end of this post, but let’s start with the basics: creating an AWS AppSync API, adding a simple GraphQL schema, and connecting it with DynamoDB for storing our data in a NoSQL database. The Query and Mutation types. I don't start coding right away ; instead, I discuss with the product and frontend dev teams to decide which types, queries and mutations must be exposed. These APIs, among other data sources, can be backed by Amazon DynamoDB for a scalable key-value and document database that delivers single-digit millisecond performance at any scale. GraphQL Objects represent a list of named fields, each of which yield a value of a specific type. GraphQL provides great API documentation and discoverability built in, with tools such as schema introspection and the GraphQL interface, but you can imagine how it could be hard to understand how to update some resource in a GraphQL schema with dozens or hundreds of defined object types. * Part 1: How to build blazing fast REST APIs with Node. The Sessions object includes a resources property, which is an array of Session objects. It is used to represent what type of objects we are fetching from the server. type Params struct { // The GraphQL type system to use when validating and executing a query. You performed your first GraphQL query in a React application, a plain HTTP POST request with a query as payload. The return type of mutations in the Storefront API always includes a userErrors field. Also since they're basically just POCOs you probably don't need any dependencies in the. Schema Schema // A GraphQL language formatted string representing the requested operation. Like GraphQL queries, mutations can also return fields. Inspired by the excellent json-server. GraphQL is a graph-oriented query language written by Facebook. Adding it to the GraphQLServer instance: const server = new GraphQLServer({typeDefs, resolvers, middlewares: [yupMutationMiddleware()],});. #1: Defines a mutation class. js (Part 2)? August 27, 2019. graphql files and export a multi-item array. That's where the scalar types come in: they represent the leaves of the query. Configuration The manager. Overfetching & Underfetching. Simply put with mutations we can create data, and if the mutation returns an object, we can tell GraphQL the specific fields to. You will use Apollo for your query and mutation implementations on the client-side of your React application. The nice thing about this is that now the authentication can be declared in my schema. View in gist. However, in a real app we should use variables instead. Whereas the first part of the previously described steps is React agnostic, the second and third parts glue the GraphQL client (data layer) to React (view layer). GraphQL Apollo Server with Node. I think I understand how to `resolve` a path into a object. Object types, fields and Scalar types : Objects are the basic components of a GraphQL schema. Each object can have fields that return a particular type, and methods that take arguments. Similar to our query earlier, we can add a new comments argument to addPost. This can make your root objects bloat with unrelated functionality. Develop Run the dev harness. GraphQL objects can then implement these interfaces which requires that the object type will define all fields defined by those interfaces. The fields defined on the mutation will be returned as the result of the mutation. For example, if you have a class named GameScore in the schema, Parse Server automatically generates a new mutation called createGameScore , and you should be able to run the code. In this file, we define one simple query for getting all User objects. See Sample. To force the data system to skip the dirty check, set a path to an empty object or array, then back to the original object or array. This field has the type String!. Mutation Classes Use mutation classes to implement behavior, then hook them up to your schema. In this video Emmanuel Henri introduces what the basic types and fields are in GraphQL, and then adds an array of emails into the main friend type. Like any JavaScript object, inside of it we have the fields and then declare what type of data we expect for this field. 6 (429 ratings) Course Ratings are calculated from individual students' ratings and a variety of other signals, like age of rating and reliability, to ensure that they reflect course quality fairly and accurately. It covers tree-based read queries, mutations for updates, and subscriptions for live updates. You can only have a single root Mutation object. This is particularly valuable in the case of mutations, where you might want to pass in a whole object to be created. The reducer gets called with two arguments: previousResults (the current data returned by the query) and action (data about the mutation and its return value), and is expected to return a newResults object that contains the new, updated query data (again, just like a Redux reducer). With the GraphQL plugin, you will be able to add a GraphQL endpoint to fetch and mutate your content. Learn how GraphQL empowers more flexibility into your APIs – and learn to build GraphQL APIs with Apollo Server! You'll create GraphQL Schemas using scalar types, object type, queries and mutations. Our GraphQL backend would be a combination of Hasura GraphQL Engine and a custom GraphQL server. In GraphQL, fetching data is done using queries, while writing to the database can be achieved through mutations. ” Connection. From what I've seen so far it looks like GraphQL would likely supersede REST the same way SOAP got obsoleted by more lightweight stateless JSON-based APIs. mutation { insert_tag(objects:[{name:""}]) { returning { name } } } This is a mutation that inserts a new tag with your specified tag name into the database. The "Serving over HTTP" section on graphql. An Overview of GraphQL. To create a custom Query type and to add Mutation and/or Subscription blocks, provide an entryPoints callback that takes a hash of GraphQL types and returns Query, Mutation (optional), and Subscription (optional) blocks. The add api flow will ask you simple questions. Priority: Minor. In this lesson, we will send mutations to register new users. In the end, we need to return something, which is the ID of the newly created object in our example. These mutations accept and emit a identifier string, which allows Relay to track mutations and responses. As part of the GraphQL implementation, objects may have 'Relations' to other objects. This is the primary facade for fulfilling GraphQL operations. The Query and Mutation types. Vue wraps an observed array’s mutation methods so they will also trigger view updates. You'll see that thanks to the GraphQL tooling, it's not much harder than building a REST client. By the end of this section, you’ll have everything you need to perform all the CRUD operations (create, read, update, delete). In this tutorial, I will be showing you how to build a full stack GraphQL app using what I call the PAV stack (Prisma, Apollo, Vue). This makes GraphQL a flexible and fast replacement for traditional REST APIs. A simple read-only schema with authors and posts. Array of Complex Types. All request are sent to that endpoint, independent from the requested object-type (blog-posts) or the desired crud (create, read, update, delete) operation. The exclamation mark in the type definition means that this field can never be null. See Sample. # apollo options To declare apollo queries in your Vue component, add the apollo object in the component options:. In this chapter, we will learn mutation queries in GraphQL. In this case, the widget fields on the props are used to construct a new widget object as a property of the input data object sent to the mutation on the GraphQL server. Here are the operations that are accepted by a GraphQL API that implements the above schema:. GraphQL has become a really helpful tool for us at Foster Made when we're developing Laravel applications. Example of a typical GraphQL schema expressed in shorthand. connection_from_promised_list is similar to connection_from_list, but it takes a promise that resolves to an array, and returns a promise that resolves to the expected shape by connection_type. We explicitly set the type of the id field to be Int while tasks is an array of the type Task (which we'll create shortly). GraphiQL might show some errors since it does not know how to handle the jsonb type. GraphQL is a perfect fit for this. The WorkflowGen GraphQL API is a Node. Mutations are used to change any stored values, or to trigger actions. How to solve Object. You can extend your schema with your own custom scalars. GraphQL Mutations. Adding it to the GraphQLServer instance: const server = new GraphQLServer({typeDefs, resolvers, middlewares: [yupMutationMiddleware()],});. Implementing a GraphQL API mutation that can upload files is not a very well documented task. I am making a graphql api where I would be able to get car by id, filter cars by color or return all the cars when no paramater is provided. This Refcard introduces GraphQL concepts. type Params struct { // The GraphQL type system to use when validating and executing a query. It can be used to insert, update, or delete data. The results are always predictable because you get what you ask for. The "problem" is that GraphQL executes a Nested mutation, returning an object with further mutation methods. In the example above, we provide the variables option to addTodo, which enables us to specify any GraphQL variables that the mutation requires. GraphQL is a graph-oriented query language written by Facebook. executing the mutation for creating user, using the input object type. In GraphQL, the Schema manages queries and mutations, defining what is allowed to be executed in the GraphQL server. The Sessions object includes a resources property, which is an array of Session objects. Mutations are defined as a part of the schema. List of object types which cannot be detected by graphql-php during static schema analysis. Implementing GraphQL mutations. Mutations are executed serially. The GraphQL Schema however needs to be built as a type system in a two step process. , we need to let GraphQL know at the top. For example, [String] indicates an array of the scalar value, String. refetchQueries is an array of strings then Apollo Client will look for any queries with the same names as the provided strings and will refetch those queries with their. By the end of this section, you’ll have everything you need to perform all the CRUD operations (create, read, update, delete). In the code below, getting a single object out of the array works i. GraphQL Schema Mutation. Similar to our query earlier, we can add a new comments argument to addPost. NET Core Web API and Angular, to consume the GraphQL application that we created until now. Many resources per request - it is possible to run multiple queries or mutations in a single request when using a GraphQL API; Introspective type system - a GraphQL API is organized in terms of types and fields that clients can introspect, allowing powerful features like auto-complete, instantly documentation, and data validation. When I develop a GraphQL server, I always start on the white board. So far, only the backend server has been created which can be seen in [the previous. If you are using the core JavaScript implementation, there are query and mutate methods on the ApolloClient instance, which take a whole variety of parameters. The "problem" is that GraphQL executes a Nested mutation, returning an object with further mutation methods. One nice lib it requires is the overblog/graphql-php-generator that is responsible for reading a nice and clean yml file and converting it into the GraphQL type objects. A decently complex GraphQL API will consist of many objects, related via multiple paths and with dozens of fields. Here’s an example of a valid mutation: # an example mutation call: mutation {addChannel(name: "basketball"){id name}} Of course this mutation won’t do anything until we define a resolver function for it. GraphQL mutations can be similarly created: Declare the class method, use the @Mutation decorator, create arguments, provide a return type (if needed) etc. Mutations can take arguments as input similar to the body of a POST request in REST. Type System defines various data types that can be used in a GraphQL application. This is a reference to every type available in the GraphQL Admin API. GraphQL supports mutations as well as read-only queries. FaunaDB's GraphQL API supports three general functions: Queries, Mutations, and Subscriptions. These APIs, among other data sources, can be backed by Amazon DynamoDB for a scalable key-value and document database that delivers single-digit millisecond performance at any scale. e when I provide the id. Attaching Resolver to Our Mutations and Queries Now that we have designed our schema, We can create our own backend + database and configure AWS AppSync to work with our backend. js , then open the GraphQL IDE in the browser at localhost:4000. A description of a mutation consumable by mutationWithClientMutationId to create a GraphQLField for that mutation. Start playing with GraphQL right away with json-graphql-server, a new testing and mocking tool for GraphQL. Enum Type Definition. ” Connection. Class Methods: /** * Executes graphql query. Now we know, how to use Input type files for the mutations, how to create different mutation actions and how to create mutation requests from a client side. of our mutation declaration. GraphQL\GraphQL. To follow along with these queries, go to the Pet Library GraphQL Playground. GraphQL, an emerging standard for querying multiple types of data systems, is shifting the debate about how we access and transform data, and may very well have as much of an impact or more as SQL. The mutation type defines GraphQL operations that change data on the server. #1: Defines a mutation class. It's a builder for GraphQLObjectType object. Starting a GraphQL server is easier than any REST server. Object relationship; Array relationship; Many-to-many relationship; Mutations; About GraphQL. In GraphQL, mutations can return any type, and that type can be queried just like a regular GraphQL query. graphql/graphql-relay-js is a set of helpers to implement Relay-compatible IDs and "connections" (one to many associations, or array fields) - it is not required to use GraphQL, however we have found that being Relay-compatible has benefited us even though we're not using Relay, with ID handling, pagination, etc. Afterward, you were able to store the result in React's local state to display it later. schemas is an array of GraphQLSchema objects, schema strings, or lists of GraphQLNamedTypes. GraphQL also gives you the flexibility to query related objects and get back a response that’s exactly the same shape as the query itself. Laravel wrapper for Facebook's GraphQL. Within this function, we’ll take the argument content and create an object with id, content, and author keys. It's important to remember that other than the special status of being the "entry point" into the schema, the Query and Mutation types are the same as any other GraphQL object type, and their. The idea is to auto-generate the mundane, repetative boilerplate needed for a graphQL endpoint, then get out of your way, leaving you to code your odd or advanced edge cases as needed. Mutation with Array. We just need to declare what options we want, add any arguments (if any), and declare what type should be returned when completed. Each UserPermission object includes an id, user id, and the permission. Each object can have fields that return a particular type, and methods that take arguments. The solution is to take a page out of the Rails playbook (and yes, I’m sure it stole it from somebody. Adding each of these to the Mutation's signature quickly becomes unwieldy and inflexible. It's a builder for GraphQLObjectType object. It will generate a strongly typed Angular service for every defined query, mutation or subscription. Unfortunately, once that object is returned, GraphQL is off to the next mutation request, unaware that there are further mutation operations to be performed in the request. Object types have a name, but most importantly describe their fields. Input Objects. A GraphQL server is built on top of schema and resolvers. In a nutshell, the system uses SHACL shape definitions to automatically generate suitable GraphQL mutations to create, update or delete objects. If this is your first time using the CLI select No and let it guide you through the default project “Single object with fields (e. We also prepared a sandbox environment for you, based on graphql-up, that you can use to experiment with what you learn. GraphQL Filtering, Pagination & Sorting Tutorial with JavaScript This is the last section of the tutorial where you’ll implement the finishing touches on your API. We took Gitlab CE (a complex rails + postgres application), hosted it on DigitalOcean and added GraphQL to it in just a few minutes. In the next part of this tutorial, we are going to create two applications, ASP. Mutations in GraphQL are the way we modify data in the server. This is the primary facade for fulfilling GraphQL operations. Relay Input Object Mutations Specification. Almost all of the GraphQL types you define will be object types. The Session object has the following properties:. The order of the strings in the array is not important, but it must include a schema definition. Learn React-Apollo in-depth, including Query and Mutation Components, Nested Components, Optimistic UI and Refetching Queries. Mutation — uses for creating, updating, or deleting data SchemaObjects — an array of defined GraphQL objects based on data tables from DB SingleName — the name of a single object in. The context is really just an Object field that can contain anything you like with the purpose of exposing it to the data fetching environment. Contribute to rebing/graphql-laravel development by creating an account on GitHub. List of object types which cannot be detected by graphql-php during static schema analysis. Object types have a name, but most importantly describe their fields. So this is your object type for the friend. ingredients (pizza) will be invoked, receiving each found Pizza object and returning an array of Ingredient. types: an array of all the GraphQL types discovered on your endpoint queries : an array of all the GraphQL queries and mutations discovered on your endpoint resources : an array of objects with a type property, which is the GraphQL type for this resource, and a property for each react-admin fetch verb for which we found a matching query or mutation. GraphQL Filtering, Pagination & Sorting Tutorial with JavaScript This is the last section of the tutorial where you’ll implement the finishing touches on your API. connection_from_promised_list is similar to connection_from_list, but it takes a promise that resolves to an array, and returns a promise that resolves to the expected shape by connection_type. Input types allow client mutation signatures to stay constant and provide better readability in the schema. Input types allow client mutation signatures to stay constant and provide better readability. GraphQL queries help to smoothly retrieve associated business objects, while typical REST APIs require loading from multiple URLs. You can return the number of affected rows and the affected objects (with nested objects) in the response. The “problem” is that GraphQL executes a Nested mutation, returning an object with further mutation methods. But while REST typically returns the full object with every field, we have to specify which fields of our object we want to receive using GraphQL. Each GraphQL schema has exactly three root types: query, mutation and subscription. Our GraphQL backend would be a combination of Hasura GraphQL Engine and a custom GraphQL server. AWS AppSync gives developers easy, and convenient access to exactly the right data they need at a global scale via its flexible GraphQL APIs. GraphQL object types are user-defined groups of one or more fields that you define in your schema. What we've found is that the AWSJSON type when hooked up with dynamodb does get translated back to a the proper structure (a map or array). Under-fetching is when the client has to make multiple roundtrips to the server just to satisfy the data. ts in src/typings/. You'll see that thanks to the GraphQL tooling, it's not much harder than building a REST client. Nevertheless the queries works fine on the GraphQL Engine. js, MongoDB, Fastify and GraphQL!. A description of a mutation consumable by mutationWithClientMutationId to create a GraphQLField for that mutation. Your domain is rich and interconnected, and your API should be too. About the reference. It describes the complete set of possible data (objects, fields, relationships, everything) that a client can access. Mutations let you create, update, and delete data using GraphQL. In this video Emmanuel Henri introduces what the basic types and fields are in GraphQL, and then adds an array of emails into the main friend type. Magic Johnson was a magician on the court for sure. Root Query. I don't start coding right away ; instead, I discuss with the product and frontend dev teams to decide which types, queries and mutations must be exposed. Creating a File Map. For example, all the records in users would be cached if another table contains an array of foreign keys to it, e. Creating automatic discounts. Array of Complex Types. Mutation errors Tips for handling and returning errors from mutations Mutation authorization Checking permissions for mutations. Simplified server implementation: Rather than having a proliferation of end-points (per action, per route), a single GraphQL endpoint can serve as a facade for any number of underlying resources. The Schema Definition Language (SDL) GraphQL has its own type system that's used to define the schema of an API. You're a frontend engineer who works with applications that consume data API, and you want to learn how to make them work with GraphQL-based APIs. variables: an object that contains the variables needed for the subscription. Mutate a list of custom objects in GraphQL for. The mutation this object type was derived from, if it is an auto-generated payload type. This field has the type String!. Each block consists of a hash of GraphQLFieldConfig objects. graphql files and export a multi-item array. Define the GraphQL schema for a module. GraphQL, an emerging standard for querying multiple types of data systems, is shifting the debate about how we access and transform data, and may very well have as much of an impact or more as SQL. You may have even seen apps that depend on it. Mutation structure examples. Example for an insert mutation containing JSON. Like any JavaScript object, inside of it we have the fields and then declare what type of data we expect for this field. We can define GraphQL mutations to perform operations like adding, updating and removing data from our graph. Return the Movie object with the nested Director object, and show the original fields. In addition to fetching data using queries, Apollo iOS also handles GraphQL mutations. In GraphQL, mutations are the way you’re going to modify data on the server and get updated data back. For GraphQL PHP runtime there is no difference between query fields with arguments and mutations. Nevertheless the queries works fine on the GraphQL Engine. TypeComposer has very convenient ways of type creation via create method. In a nutshell, the system uses SHACL shape definitions to automatically generate suitable GraphQL mutations to create, update or delete objects. js app then open the browser. GraphQL has three basic types of operations that you can perform: queries, mutations, and subscriptions. ‘express-graphql’ comes with the ‘GraphiQL’ browser IDE that makes the query and mutation more easier to debug. You can call many resources in a single request. Fragments are useful to share parts of GraphQL documents in other documents to retrieve the same data consistently and also to not copy-paste code. In this article, we explain all of the GraphQL fundamentals you'll need to start your successful journey with the GraphQL architectural style of APIs. This object must have the same shape as the mutation's response type, as defined by the GraphQL schema. ” Connection. The goal is to allow clients to constrain. Building Mutations Mutations live in app/graphql/mutations ideally grouped per resources they are mutating, similar to our services. It's well worth checking out here. In this tutorial, I will be showing you how to build a full stack GraphQL app using what I call the PAV stack (Prisma, Apollo, Vue). Example multipart upload GraphQL mutation. In this tutorial you'll build and deploy a GraphQL server with Node. Make practical, production-ready full-stack applications with React and GraphQL; Learn the GraphQL language, how to write queries and mutations both on the client and the server. So I recommend to upload via some REST API and then provide a path of the uploaded file to your mutation request. Graphql server with node and couchbase, ottoman and spatial view Graphql is a query language for APIs, it was developed by facebook and it was released in 2015. You can extend your schema with your own custom scalars. " About mutations. This object will hold all of our mutation. We've also built & deployed a real-world GraphQL API that will automatically scale for you as your application scales. If you are using the core JavaScript implementation, there are query and mutate methods on the ApolloClient instance, which take a whole variety of parameters. AWS AppSync: Rapid prototyping and development with GraphQL. * Part 1: How to build blazing fast REST APIs with Node. When you create GraphQL schemas, you can define fields that return lists of any GraphQL type. Code examples can be found in the examples/ folder (built out from the configuration docs below). The Session object has the following properties:. That is, pretty much, all to it. In the next mutation you’ll define them as just one. In this post, we’ll go over some of the most basic usage, including: A hello world schema (and an intro to Launchpad, a tool for learning about GraphQL servers). Relay Input Object Mutations Specification. GraphQL Objects represent a list of named fields, each of which yield a value of a specific type. This course is designed for anyone who wants to start building applications with React and GraphQL!In this course, we will build a recipe application from scratch with full authentication (sign up, sign in, sign out), as well as the ability to create, browse, search for, save, and delete recipes. Nevertheless the queries works fine on the GraphQL Engine. Using input object type for mutations. To add subscriptions to your GraphQL schema you'll need a plugin to provide the relevant subscription fields (by extending the Subscription type) - or you can write your own with makeExtendSchemaPlugin. Client Authorization If we set up the authentication correctly, the API now knows that we are who we say, but there is still the possibility that we want to query for data we aren't allowed to access. Since the server knows that the images field is an array of File types it will match all null values in the array, in order of appearance, with their index in the map field and dereference their JSON pointer. Array , }, ) => Disposable; The function returns a Disposable on which you could call dispose() to cancel the refetch. Mutations - Set of operations that change data on the server. Almost all of the GraphQL types you define will be object types. Inside this function, we establish a connection and call the insert query on the members table, passing the entire input object. Store updates Most of the time it is not necessary to tell Apollo which parts of the cache to update, but if your mutation is creating a new object or deleting something, you will need to write some extra logic. executing the mutation for creating user, using the input object type. You can make very smart queries, but just queries. Mutation errors Tips for handling and returning errors from mutations Mutation authorization Checking permissions for mutations. The users field returns an array of UserType objects, and can never be nil (but can be empty). A common example is that creating an object in a database and updating an object in a database often take the same parameters. Relay Input Object Mutations Specification. The field could be a string an array of another type, et cetera. Follow this step by step guide and work with GraphQL API. If you want to practice implementing GraphQL resolvers a bit more, here’s an optional challenge for you. The final piece of the GraphQL puzzle is mutations. It is used to represent what type of objects we are fetching from the server. Every GraphQL schema has a root type for both queries and mutations. schema { query: EmployeeQueries mutation: EmployeeMutations } type EmployeeQueries { employees: [Employee] employee(id: ID!): Employee!. This training course is for you because You're a backend engineer who designs APIs, and you want to learn how GraphQL is different. Now you're curious about GraphQL APIs and want to understand how they work. A simple read-only schema with authors and posts. GraphQL Apollo Server with Node. In this file, we define one simple query for getting all User objects. GraphQL queries can also traverse related objects and their fields, letting clients fetch lots of related data in one request, unlike REST API where you would have to make several roundtrips. If you're new to GraphQL, graphql-tools is a great way to build your first server. In a nutshell, the system uses SHACL shape definitions to automatically generate suitable GraphQL mutations to create, update or delete objects. Fetching Context. js, MongoDB - GraphQL API Si esta es tu primera visita, asegúrate de consultar la Ayuda haciendo clic en el vínculo de arriba. The GraphQL schema language supports the scalar types of String, Int, Float, Boolean, and ID. What the transformer does is it queries graphql for the graphql object type definition, then leverages it to serialize and deserialize the AWSJSON fields (including for nested types). All request are sent to that endpoint, independent from the requested object-type (blog-posts) or the desired crud (create, read, update, delete) operation. Instructor: The next step I want to take is to actually check. First, let’s review some of the benefits of GraphQL from a high-level. In addition to fetching data using queries, Apollo iOS also handles GraphQL mutations. Okta was used to authenticate the user, both in the client as well as the server application. In the previous articles basic GraphQL setup in express and input object type as an argument for GraphQL mutations, we used GraphiQL for executing queries and mutations. connection_from_promised_list is similar to connection_from_list, but it takes a promise that resolves to an array, and returns a promise that resolves to the expected shape by connection_type. By deconstructing the GraphQL protocol and using the graph-php library to achieve fine-grained control of all elements, it is convenient to extend the class according to its own needs. It's a builder for GraphQLObjectType object. In SDL this is written as follows:. An array of one or many items will be returned. You will use Apollo for your query and mutation implementations on the client-side of your React application. The queries described here require the read_discounts permission. GraphQL object types are user-defined groups of one or more fields that you define in your schema. Automatic discounts refer to the set of objects and mutations in GraphQL that let you create and manage discounts that are automatically applied to a cart if prerequisites are met. GraphQL Apollo Server with Node. executing the mutation for creating user, using the input object type. I begin searching for a good GraphQL backend and I settle with Graphcool which seems the best out there at this moment: has a lot. What's I'm missing from all the GraphQL examples seen out there is some kind of interaction with database. In the next sections, you will learn how to add a database layer to the GraphQL server in order to persists the data beyond the runtime of the server. The mutations described here require the write_discounts permission. The WorkflowGen GraphQL API is a Node. In this case, the widget fields on the props are used to construct a new widget object as a property of the input data object sent to the mutation on the GraphQL server. Example for an insert mutation containing JSON. For example, if you have a class named GameScore in the schema, Parse Server automatically generates a new mutation called createGameScore , and you should be able to run the code.