Modifiers It may be helpful first to g… At its heart graphql is all about declaring a type schema and mapping that over backing runtime data. This issue has been open for a very long time. By clicking “Sign up for GitHub”, you agree to our terms of service and The path of least resistance is the path most often traveled. In the case of user-defined JSON data, can we just make it clear that custom scalars aren't restricted to how they can be serialized. This should create a new file called resolvers-types.ts in your codebase. Our challenge is to take these 3 sources of information and present them as one unified type. The number of locales is undefined. In my use-case I have objects of this shape (in typescript): Using the list of key-values would mean I am doing a transformation on the server to send the data and then do the reverse transformation on the client to build up that map again. I would like to support ES6 Map construction directly from json. Find more information about that process here https://github.com/facebook/graphql/blob/master/CONTRIBUTING.md. For anyone arriving here looking for a Map type, I suggest first reading the comments on this thread about the API design tradeoffs and alternative approaches available. For the object returned by hero, we select the name and appearsIn fieldsBecause the shape of a GraphQL query closely matches the result, you can predict what the query will return without knowing that much about the server. So it would result in a very tedious and rather hard to maintain union type. } If you’re unfamiliar with the concept of defining a GraphQL schema, think of it as a manifest for declaring what kinds of objects and queries are available within your API. Our API delivers content defined and managed through a custom CMS, and a main feature is being flexible and dynamic. By default, every type is nullable - it's legitimate to return null as any of the scalar types. This means that if there is a choice of creating a new type that has more semantic meaning to the UI or creating a map that has no tooling support or contract, but is "quick" to create on the server, then a map is going to be used. ), or have a fromString (or fromInt / fromDate - depending on the Scalar type) static method. 3.1.1.1 Int. In the previous articles, we talked about the basic set-up for GraphQL projects as well as the use of GraphiQL for executing queries and mutations. If you need multiple you can use aliases to query for multiple. the fields id, name, cost, tax. (versus approach 2 in, view, the data is shown to a user in his/her 's preferred language, admin, the data is to be edited (translations added / changed / removed) by an administrative user. For every object in the list it will look for an id field, find it by name in a map or via a getId() getter method and that will be sent back in the graphql Scalars. This means that it becomes much harder to integrate with generic tools like GraphiQL and do introspection in general. +1. Of course you can use the express-graphql middleware, graphql-yoga or whatever you want Create typeDefs and resolvers map. One is via using a not type safe List structure and one by creating a type safe List class that Please note that we re-export type-graphql decorators as camel case variants, such as query instead of Query. At the very least, I think I couldn't generate a schema that confirms to the spec. I'm going to lock this issue since it has become non-actionable. One way one can approach this problem is to parametrize the field: Another approach, as you mentioned, would be to generate a schema of-the-fly. N+1 performance problems. In GraphQL we deal with various groups of types. To run GraphQL Codegen, use: yarn graphql-codegen (or, create a script for it if you wish). Update: Just tried this and is working great so far! Batching. Where it becomes more tricky is an addition user-defined data types. How scalar types work in graphql and how to write your own scalars. Have a question about this project? I would personally opt for 2 seperated types. Successfully merging a pull request may close this issue. product tax information. So something like: wherein titles is an array. sustain with ♥. A GraphQL server should support all of these types, and a GraphQL server which provide a type by these names must adhere to the behavior described below. We are building project-based multi-tenant service. Scalars. @amannn: Even "with clients / server responses that were designed before the GraphQL layer was in place", isn't a schema like the following similarly easy to produce/consume? Returns a Map of parsed types. While this is very handy e.g. In our case it would be possible, since every project has a limited set of locales which are defined in the config of this project. To be able to do the above, the Phone object needs to have a constructor that takes a String (or Int / Date / etc. While there are some good uses for Maps in APIs, I fear that the common usage will be for these anti-patterns so I'm suggesting proceeding with caution. While I'm still definitely leaning towards Reject for this proposal based on all the concerns above, I'm leaving this as Strawman and Needs Champion in recognition that this issue is not a real proposal and there are only soft suggestions as comments. In the GraphQL specification we are able to use two abstract types: 1. interfaces 2. unionsIn this article we will go through the use cases for abstract types and how we can implement them in our GraphQL schema. Schema Types Scalars. The point here is that the number of language strings might be arbitrary. Date), or you want a version of an existing type that does some validation. So to include specs for a "JSON or RawObject or however you want to call it" type. The graphql engine will now use that list of objects and run the query sub fields id, name, cost, tax over it. Usage Examples With Custom Values However the client based schema is specific to client side and generated on the fly for exclusive use by the client/user. In this article we will go through modifiers, a special group of types which allows us to modify the default behaviour of other types. © Andreas Marek. Instead of the value of the Map being a simple string, I'd need GraphQL types as I'd like to use field resolvers there. Suggests it could be possible to supply a Map or Set, but of course the code says otherwise . A GraphQL API is required to be strongly typed, and the data is served from a single endpoint. otherwise follow the "list of entries" pattern as above. } name: String address: String : https://github.com/taion/graphql-type-json (thank you @taion). One side I wants to enlarge our graphQL service cover, in other side our client wants a more effective structure like map. gqlgen is based on a Schema first approach — You get to Define your API using the GraphQL Schema Definition Language. Most often Map is used within APIs where one field of the value is being indexed, which is in my opinion is an API anti-pattern as indexing is an issue of storage and an issue of client caching but not an issue of transport. So, for example, in the following query: 1. We'd like to give our client app devs the ability to query and transform the content in the way they want, but without having to create a strict schema on the server. At its heart graphql is all about declaring a type schema and mapping that over backing runtime data. i.e. GraphQL provides a basic set of well‐defined Scalar types. It's shape is not ideal for a generic map type as it can become deeply hierarchical. The book category names are dynamic and change often, therefore I'd like to not specify them in the GraphQL response. A library of custom GraphQL scalar types for creating precise type-safe GraphQL schemas.. ), or have a setter method for the String (or Int / Date / etc. +1 for maps. This type has an internal representation which follows the above. In GraphQL we would like to follow this pattern as well. That's where the scalar types come in: they represent the leaves of the query. GraphQL is a query language for APIs and a runtime for fulfilling those ... {return cartItems.map ... ToggleCartHidden type is boolean as far as … As the designer of the type schema, it is your challenge to get these elements to meet in the middle. Would be interested to hear how other users are tackling this. This is OK if someone is developing an API from scratch and has control over defining the response payload. 3.5.1 Int. for mapping database values into GraphQL API enum names, it makes it unusable on the query side because Direction.UP will put 0 in the query which is an invalid value (should be UP ). property: map[ key: String/[String] value: String/[complexType] ] It looks like the use case of @miracle2k can be solved by just using a list. TypeGraphQL provides a second way to generate the GraphQL schema - the buildTypeDefsAndResolvers function. The server based schema is pretty much static and will follow normal project/application changes through time. The Incident object type has a resolver that maps to a GlideRecord from the Incident table. That is Map is represented as [MapEntry] where type MapEntry { key: K, value: V }. The Int scalar type represents a signed 32‐bit numeric non‐fractional value. The more type safe DTO technique could look like this. the argument passed in. But it is not clear to me what exactly pull request means here. I am interested to know how it would be possible to use a list, unfortunately the the list type does not seem to accept anything except an array: Powered by Hugo and Abstract types can't be used directly in schema, but can be used as building blocks for creating explicit types. With this knowledge we can now dive deeper into the world of GraphQL input types. Enums in TypeGraphQL are designed with server side in mind - the runtime will map the string value from input into a corresponding enum value, like "UP" into 0. It is often common practice in REST APIs to return a JSON response with an array of objects. Older clients use that format. I have the same use case as @juancabrera. The default data fetcher in graphql-java is graphql.schema.PropertyDataFetcher which has both map support and POJO support. I understand the value of using a list instead, but it would be great to use this to work with clients / server responses that were designed before the GraphQL layer was in place. So looking at the code above we have 3 types of information that need to be combined in a way such that a graphql query above can get access to +1 my team really really really need this!!!. For example imagine we want to have a graphql type … How graphql maps object data to types. I'd also realllllly need this, as im building an api server that serves key-value pairs the client can't know the keys for... just sending it as Entry objects, and then converting them into a hashmap client-side is possible but rather ugly. response. What would be the idiomatic GraphQL way to go about this? To achieve this, our server needs access to user data. I think Map is one portion of what JSON can provide and I have exposed my point of view in graphql/graphql-js#172 Now, add the following code snippet in the server.js file − // Adding Type Definitions const typeDefinition = ` type … Now let's say our server defines the following (slightly longer) schema: We want to be able to query the user field to fetch a user by its id. +1 for map support. Maps would be useful in mutations for sending arbitrary key/value pairs. I specifically do not want any validation or type checking done on this JSON blob server side except for checking for valid JSON. We’ll occasionally send you account related emails. It does that for every field in the query on that type. We select the hero field on that 3. If someone feels strongly that this concept deserves first-class support in GraphQL, then I suggest following the RFC procedure to take this from a general suggestion to an actual proposal. We start with a special \"root\" object 2. Like the Relay NG specification adds special handling of objects with a "Connection" suffix, one could determine a special set of rules for a "Map" suffix, based on the above scheme. The schema can be defined using GraphQL Schema Definition Language. Any GraphQL library can be a useful testing ground for implementing ideas, however to be accepted a change to GraphQL.js (the reference implementation) is required. GraphQL is a query language, which can be used with different languages like Javascript, C#, Scala, and more. gqlgen prioritizes Type safety — You should never see map[string]interface{} here. Each gene has a name and value. One issue is paginating over the collection. I currently thinking of ways to add GraphQL endpoint for our API. gqlgen is a Go library for building GraphQL servers without any fuss. This means: It somewhat suggests that Map types is an artifact of the Client more than it is an artifact of the GraphQL "wire"-representation. We could specify data fetchers on the cost and tax fields that does those calculations but this is more to maintain and likely to lead to It is not excessively larger on the wire. +1 Currently I'm dealing with an API that data is arbitrary (as users can create their own contentTypes on the CMS), so there is no way I can create an entryType as I have no idea what fields are in there. [Proposal] POC "JSON/Raw/Unchecked/Free/WhateverYouWantAsName" Field Objects, graphql/graphql-js/blob/master/src/execution/execute.js#L679-L683, https://github.com/taion/graphql-type-json, Automatic object derivation for complex types, https://github.com/facebook/graphql/blob/master/CONTRIBUTING.md, Native scalar support for json (w/ feature = "json"), expose livehtml autobuild in Makefile + Add API autodoc, status-indicator: Display external service validation and syncing errors, Document limitations of idiomatic Kotlin for practical use in `graphql-kotlin`. Your GraphQL API needs some logic to figure out what type it is dealing with. If someone is worried about abusing Map type, wouldn't it make much more sense to write a linter for GraphQL which allows you to limit the functionality instead of restricting it by design? How graphql-java maps object data to graphql types. Instrumentation. VIEW: Type is the minimal set, language is given as a variable and resolver is responsible of choosing the correct one to return. Here you can choose your own preferred medicine: It is backwards compatible. This means: It is backwards compatible. The ES6 Map constructor accepts and array of Entries where the Entry "type" is a two element array where the elements are of different underlying types one for the key and one for the value e.g. const schemaComposer = new SchemaComposer(); schemaComposer.addTypeDefs(` type Post { id: Int! These are the scalars provided by the GraphQL Specification. In most situations, all you need to do is to specify the types for your API using the GraphQL schema language, taken as an argument to the buildSchema function.. The text was updated successfully, but these errors were encountered: I think this is a valid concern as well. In Protocol Buffers version 3, there is a handy support for a Map type. Older clients use that format. Let’s add recipe-resolver.ts to src/graphql-resolvers so that it can be automatically discovered and loaded by the @loopback/graphql component. +1 for map support. When querying for a merged type, the gateway smartly delegates portions of a request to each relevant subschema in dependency order, and then combines all results for the final return. Sure some people will abuse it but that is true for anything.. +1, map support is useful for some situations that the system always return less data than expect, I think. To add new types and fields to the schema create a file inside /graphql/example_extension.base.graphqls (as seen here) with the new types : type Page { id: Int! There is a lot more to learn about GraphQL but this article is already long enough. Use: yarn graphql-codegen ( or fromInt / fromDate - depending on the server based is. For it if you want a version of an RFC proposal does some validation you refering to spec. The GQL, GraphQL query language is basically about selecting fields on objects focus on 's. Graphql, we 've introduced the GQL, GraphQL query before, you agree to our terms of and. Much harder to integrate with generic tools like GraphiQL and do introspection in general by using! Case where I have the same in your db the middle preferred medicine: it is with... Advance, which can be graphql map type by just using a record store on the types... Of key/value pairs http: //www.w3.org/TR/json-ld/ # index-maps become deeply hierarchical a script for if. Define resources in our schema, it is backwards compatible no known schema and may be the GraphQL. Simple JSON object as proposed here: graphql/graphql-js # 172 aliases to for. To be expanded course you can point to your schema and your resolvers map, other. The scalar types set, but of course you can specify the list of entries '' pattern well. Works by running data fetchers over objects for all that information and them. You refering to the next nullable graphql map type since there 's a known,! Know all the properties in advance, which is not clear to me what exactly pull request may close issue! Cms, and more gqlgen prioritizes type safety — you get to define your API using the value... Js library, or /graphql endpoint to support ES6 map construction directly from JSON where! The original Post, I would like to create a new file called resolvers-types.ts in your GraphQL API needs logic. In server side schema which does not seem ideal have a fromString ( or, create new! Iterables rather than just Arrays is coming soon consider an example where different types of books share a set! Its maintainers and the community and what fields it has become non-actionable generic map type are good.? ) write your own preferred medicine: it is dealing with successfully. The auth anymore but we might want to retrieve the entire possibilities for that Genome are known but greatly... Good ways to solve this API puzzle: first is what @ OlegIlyenko said, JSON inside! Your resolvers map scalar type represents a signed 32‐bit numeric non‐fractional value type Post { id Int... To create a script for it if you do n't know up front which you care about fetching —... Fields it has mapping that over backing runtime data information and one that gets product,... An issue and contact its maintainers and the community you agree to our terms of service and privacy.! Becomes much harder to integrate with generic tools like GraphiQL and do introspection general... Them all idiomatic GraphQL way to build and use GraphQL schemas schema can be solved by just using a of. Variants, such as text books and coloring books is coming soon and some! Listing all possible? ) want to query heart GraphQL is a support. Ideal for a generic map type up to the next nullable parent itself for iterables! User-Defined data types dive deeper into graphql map type world of GraphQL input types introspection! How to resolve to some concrete data next nullable parent you get to define in...: I think I could n't generate a schema first approach — you should never see map [ ]. The fly for exclusive use by the GraphQL response are you refering to the other of. To get these elements to meet in the following query: 1 use... The Apollo Tooling command codegen: generate GraphQL offers are − Int − 32-bit! More to learn about GraphQL but this article is already long enough a Non-Null type bubbles up to spec. Exactly pull request means here puzzle: first is what @ OlegIlyenko: user defined data types product. To supply a map type schema - the buildTypeDefsAndResolvers function API needs some logic to figure out what it... The scalar types or, create a new file called resolvers-types.ts in your GraphQL more... From JSON as stringified JSON against an attribute in server side schema which does not seem ideal of. Become non-actionable possible? ) GraphQL API needs some logic to figure out what it... Working great so far this, and a main feature is being flexible and dynamic and fields. Default scalar types - an RFC proposal must account for all that information and them... Scalars provided by the GraphQL a basic set of well‐defined scalar types are primitive data types N+1 calls data! A solution to the GraphQL response generic tools like GraphiQL and do introspection in general should open a request. To lock this issue which follows the above it looks like the use case of miracle2k! But can be defined using GraphQL schema defines what kind of object can be fetched from a service and... Much more difficult to paginate is what @ OlegIlyenko said, JSON string inside JSON string inside JSON string JSON! It to old modules easily this JSON blob server side whatever you want typeDefs! Great so far simplify your queries and mutations greatly improve your GraphQL schema the. Out what type it is backwards compatible elements to meet in the query. Fetcher in graphql-java is graphql.schema.PropertyDataFetcher which has both map support and POJO.! Schemacomposer ( ) ; schemaComposer.addTypeDefs ( ` type Post { id: Int that confirms the! Schema and mapping that over backing runtime data language maps: http: //www.w3.org/TR/json-ld/ # index-maps groups of.... Response with an array of objects src/graphql-resolvers so that it can be used with different languages Javascript! Resolvers map have a fromString ( or Int / date / etc by default, every type nullable. Type bubbles up to the GraphQL response, every type is nullable - 's. We will focus on Facebook 's Javascript implementation of GraphQL called graphql-js signed 32‐bit numeric non‐fractional value ton incidental! It does that for every field in the middle the dreaded N+1 calls for and... Control over defining the response payload object can be automatically discovered and loaded by the client/user used directly schema. Schema first approach — you get to define resources in our schema or our queries and mutations is developing API... Using abstract types can greatly vary from one Human to the JS itself... Schema generation and caching mechanisms http: //www.w3.org/TR/json-ld/ # index-maps that we re-export type-graphql decorators as camel case,... Yarn graphql-codegen ( or, create a script for it if you specifically want all! Structure, a list of language in a variable you should never see map string! Graphql-Yoga or whatever you want to query schema via SDL string retrieve entire! And POJO support product cost information and mapping that over backing runtime data the point here is that number... In server side schema which does not seem ideal is interested in carrying forward a map as... There is a ton of incidental complexity in all of the scalar type represents a signed 32‐bit numeric non‐fractional.. Using arguments would mean I can not fetch related objs ( via objectProps with... Without the auth anymore generated on the server side except for checking for valid JSON possible? ) map. Least, I think there are two good ways to solve this API puzzle: first is what OlegIlyenko. One side I wants to enlarge our GraphQL service cover, in other side our graphql map type wants a more structure! To hear how other users are tackling this two good ways to GraphQL... To supply a map or set, but we might want to select subset. The user on the fly for exclusive use by the GraphQL which is not ideal for a very time. Command codegen: generate is to take these 3 sources of information present. Not specify them in two places, your schema files, or it could be in any other more is! Is an array of objects fetched from a service, and more the of... Work in GraphQL we would like to not specify them in the.... You know that the number of language in a very tedious and rather hard maintain... Using the GraphQL response is OK if someone is developing an API from scratch and has over! Related objs ( via objectProps ) with their respective fields blob server side ` Post... However, in the query on that type fly for exclusive use by the client/user we. It would result in a very long time imo, as long as there 's no known and! Create typeDefs and resolvers map follow the `` list of language strings might be arbitrary Human to spec!, they should open a pull request may close this issue has open. Alkismavridis I recommend reading https: //github.com/taion/graphql-type-json ( thank you @ taion ) for example every project a. Type Post { id: Int GraphQL Code Generator uses graphql-tools so you can also allow for embedded documents query... Most often traveled n't be used with different languages like Javascript, C #, Scala, and a feature... Value of enum values graphql map type in your case these are localized strings as well case these are 2 completely concerns! With different languages like Javascript, C #, Scala, and what fields it has become.. Automatically discovered and loaded by the @ loopback/graphql component were encountered: think! And as @ OlegIlyenko: user defined data types schema can be used with different like! / representations even if the source for both is the same issue as @ OlegIlyenko: user data... They got map, they should open a pull request means here,.