Custom scalars for GraphQL.
Currently available scalars:
npm install graphql-scalars --save
This custom scalar for GraphQL parses any integer, float, string or date value to javascript dates.
GraphQLDate uses new Date() to parse values so, please refer to the documentation for more details.
GraphQLDate serializes dates to ISO 8601 strings.
import {
graphql,
GraphQLObjectType,
GraphQLSchema
} from 'graphql'
import { GraphQLDate } from 'graphql-scalars'
const schema = new GraphQLSchema({
query: new GraphQLObjectType({
name: 'RootQuery',
fields: {
createdAt: {
type: GraphQLDate,
resolve () {
// Resolver can return an integer, string or date value.
// The following return values all resolve to the same date.
// `return 262915200000`
// `return '1978-05-02'`
// `return '1978-05-02T00:00:00.000Z'`
return new Date('1978-05-02')
}
}
}
}),
mutation: new GraphQLObjectType({
name: 'RootMutation',
fields: {
setCreatedAt: {
type: GraphQLDate,
args: {
createdAt: {
type: GraphQLDate
}
},
resolve (source, { createdAt }) {
// `createdAt` is a javascript date
return createdAt
}
}
}
})
})
const query = `
{
createdAt
}
`
graphql(schema, query)
.then(result => {
const isoString = result.data.createdAt
console.log(isoString) // 1978-05-02T00:00:00.000Z
})
// literals for GraphQLDate can be any integer or string value
// `setCreatedAt(createdAt:262915200000)`
// `setCreatedAt(createdAt:"1978-05-02")`
// `setCreatedAt(createdAt:"1978-05-02T00:00:00.000Z")`
const mutation = `
mutation {
setCreatedAt(createdAt:"1978-05-02")
}
`
graphql(schema, query)
.then(result => {
const isoString = result.data.createdAt
console.log(isoString) // 1978-05-02T00:00:00.000Z
})
GraphQLEmailAddress uses the regular expression as per HTML5 specification to validate input email addresses.
GraphQLURL uses the regular expression by Diego Perini.
graphql-scalars is MIT-licensed.
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