I'm trying to have a representation of nodes on GraphQL more akin to what jsonapi would be like http://jsonapi.org/
What I mean is if we take one of the examples on GraphQL
{
hero {
name
# Queries can have comments!
friends {
name
}
}
}
Have a representation that would be more along these lines
{
hero {
name
# Queries can have comments!
friends {
id
}
},
friends {
id, name
}
}
Is that at all possible in GraphQL
Thanks
It is possible, and there's nothing wrong with having a friends field. In GraphQL terms you can have the following part of the schema:
type User {
id: ID
name: String
firends: [User]
}
type RootQuery {
hero: User
friends(forUserId: ID!): [User]
}
And then you can query this as you like – you can ask for friends separately:
{
friends(forUserId: "12") {
id, name
}
}
But the whole idea of GraphQL is that you don't have to do multiple queries to get the information you need. If you just need a list of users – that's a reasonable query, that most people have (with arguments for pagination and so on). With that said, there's no reason to fetch a list of IDs and to send another fetch query for the data right after that.
Related
I using https://hygraph.com/, and I want insert (create many products) in a single GraphQL request.
At the moment I know how to insert one product:
mutation {
createProduct(data: { title: "Face Mask", slug: "dfavce-mask", price: 1000 }) {
id
}
}
I read the documentation, but I didn't see information about bulk creation records.
Link for hygraph documentation:
https://hygraph.com/docs/api-reference/content-api/mutations#create-entries
The top-level query you show is just a query against the Mutation type (or another type specified in the schema). Like any other query, it can have multiple fields. At a technical level, the only special thing about GraphQL mutations is that, if you do have multiple fields, they execute sequentially.
Also like other queries, if you want to request the same field multiple times (run similarly-named mutations) you need to use an alias to disambiguate the results.
mutation {
createFaceMask: createProduct(data: { title: "Face Mask" }) { id }
createHandSanitizer: createProduct(data: { title: "Hand Sanitizer" }) { id }
}
I am using appsync with amplify and trying to figure out how to query based on two different selectors. Basically I need to either query all if neither county or facility are supplied, query with county while facility is empty, or query with facility while county is empty. I thought I could wrap this into 1 query but it doesn't seem like I can. My appsync schemas look like this.
type Client
#model
#key(name: "clientByCountyOrFacility", fields: ["county", "facility"], queryField: "getClientsByCountyOrFacility")
#searchable {
id: ID!
facility: String!
county: String!
products: [Product] #connection(name: "ClientProducts")
}
type Product
#model
#searchable {
id: ID!
client: Client #connection(name: "ClientProducts")
}
I can get this to work by using (below query) but I am worried this will run into the 100 scan limit because it uses the listClients query underneath. Possibly if there was an easy way to change that could be a solution but it seems the files in amplify are autogenerated.
query getClientsByCountyOrFacility($county: String = "", $facility: String = "") {
listClients(filter: {
county: {
contains: $county
}
facility: {
contains: $facility
}
}) {
items {
id
products {
items {
id
}
}
}
}
}
I added the #key to see if I could create an index but it doesn't like that and I'm at a lose for how to acquire the data. How do I go about building this schema and query to get the data back?
{
Post {
name
}
}
While trying to retrieve all the entries on a content type, it only gives error of:
"Argument \"id\" of required type \"String!\" was not provided."
Since id field is required. How do I get all entries of a content type then?
Ref: https://www.contentful.com/developers/docs/references/graphql/
From docs here:
The produced Query object exposes two fields that you can use to query content of that type: one to fetch individual content documents (friendlyUser in the example) and another to do queries over all the content of the type (friendlyUserCollection).
So for any resource that you want to retrieve all entries of, you need to append Collection at the end of its id, then use items field to retrieve all entries. As in:
{
PostCollection {
items {
name
}
}
}
Apart from docs, you can also view all available resources at corresponding GraphiQL instance here, which could be pretty useful:
https://graphql.contentful.com/content/v1/spaces/{SPACE_ID}/explore?access_token={ACCESS_TOKEN}
Search or select Query to see all schemas:
Query a single id
I think you can try this in the GraphQL playgound
http://localhost:8000/___graphql
query PostById($id: String!) {
contentfulPost(id: { eq: $id }) {
name
}
}
and add a QUERY VARIABLE
{
"id": "my-awesome-id"
}
Query all the Posts
How do I get all entries of a content type then?
On the GraphQL playground, you should be able to do something like this
{
allContentfulPost {
nodes {
name
}
}
}
I am trying to list a set of articles by their categories, by uid, and I'm assuming that I would have to use the where query, but I'm not able to get that to worked on linked documents.
The issue seems to be that where only accepts a string on a field, but in the case of a linked document you would need to dig down to the uid field.
I'm not sure if I'm using the wrong query, but struggling to find anything in the documentation to help me out.
I tried digging into the category object:
{
allDirectoryServices(
where: { category: { _meta: { uid: "developers" } } }
) {
edges {
node {
name
city
region
country
category {
...on DirectoryTaxonomy {
_meta {
uid
}
name
}
}
}
}
}
}
But that returns an error that it's expecting a string:
"message": "Expected type String, found {_meta: {uid: \"developers\"}}.",
{
allDirectoryServices(
where: { category: "developers"}
) {
edges {
node {
name
city
region
country
category {
...on DirectoryTaxonomy {
_meta {
uid
}
name
}
}
}
}
}
}
This returns no results, obviously.
I asked this question on the Prismic Slack group too, and got the answer from them:
In order to query by a Content Relationship / Link field like this, you need to use the document ID.
where: { category: "WBsLfioAABNUo9Kk" }
Unfortunately it isn’t possible to query by the UID (or any other field).
I imagine they will be updating their documentation soonish, as this isn't covered by it.
Thanks to the Prismic guys!
I've a graphql-jave v8.0 app running on Spring boot v1.5.10, and I'm trying to utilize 'fragment' feature of GraphQL to fetch limited number of fields with the following schema type definition:
type School {
id: ID
name: String
address: String
age: String
jobTitle: String
...
}
fragment UserFields on School {
age
jobTitle
}
type Query {
user (id: String!): School!
}
schema {
query: Query
}
When I execute this query:
{
user (id: "123")
{
... UserFields
}
}
The expected result should be:
{
"user": {
"age": "12",
"jobTitle": "student"
}
}
However, It results in the following error
"message": "Validation error of type UndefinedFragment: Undefined fragment
UserFields # 'user'",
Off course I can do this with explicitly passing the field name in the query but for the sake of example, I'm interested in utilizing fragment feature of GraphQL.
Any idea what I'm doing wrong please?
Fragments aren't defined in the schema, they're something for letting you create abstractions whilst building complex queries -- the main purpose is to allow you to avoid repetition when querying the same type in multiple parts of your query.
As Andrew said, and as the official docs exemplify, fragments are not defined in the schema but (ad hoc) in the query:
{
user (id: "123") {
... UserFields
}
}
fragment UserFields on School {
age
jobTitle
}
Unconditional fragments (like the one here) are used to avoid repetition. Imagine having multiple places where you want to select age and jobTitle in the same operation.
Conditional fragments, on the other hand, are used to make a conditional selection depending on the concrete interface implementation or union subtype.