### Author:  [@michaeldouglasdev](https://community.apollographql.com/u/michaeldouglasdev)
#### Post date: [April 18, 2024, 4:38pm UTC](https://community.apollographql.com/t/apollogateway-with-defer/7399/1 "2024-04-18T16:38:11Z")
Is it possible to use defer with ApolloGateway?
I have this config on my ApolloGateway:
```auto
const gateway = new ApolloGateway({
supergraphSdl: new IntrospectAndCompose({
subgraphs: SubgraphContainer.list().map(({name, url}) => ({ name, url })),
}),
buildService: ({ name }) => {
const subgraph = SubgraphContainer.get(name)
const datasource = buildGraphQLDataSource(subgraph);
return datasource;
},
__exposeQueryPlanExperimental: true,
queryPlannerConfig: {
incrementalDelivery: {
enableDefer: true,
}
},
})
```
But @defer does not works
Error: Unknown directive "@defer".
I have installed graphql 17 using:
```auto
npm i --legacy-peer-dep graphql@17.0.0-alpha.2
```
In another project without Apollo Gateway, I just needed to add this snippet (including graphql 17) to work:
```auto
const schema = makeExecutableSchema({
typeDefs,
resolvers,
})
const transformedSchema = new GraphQLSchema({
...schema.toConfig(),
directives: [...schema.getDirectives(), ...specifiedDirectives, GraphQLDeferDirective]
})
const server = new ApolloServer({
schema: transformedSchema
})
```
I have some directives and I apply them like this:
```auto
const directiveTransformers = [
//...
];
const transformedSchema = directiveTransformers.reduce((schema, transformer) =>
transformer(schema), buildSubgraphSchema({
typeDefs,
resolvers,
})
)
```
I can’t add GraphQLDeferDirective from the ‘graphql’ package to my directiveTransformers array, because GraphQLDeferDirective is of type GraphQLDirective, and my transformers (created using mapSchema from ‘@graphql-tools/utils’) return GraphQLSchema
---
### Author:  [@dkuc](https://community.apollographql.com/u/dkuc)
#### Post date: [April 19, 2024, 4:10am UTC](https://community.apollographql.com/t/apollogateway-with-defer/7399/2 "2024-04-19T04:10:31Z")
`@defer` is not supported by the Apollo Gateway and we only support it in the Router.
---
### Author:  [@michaeldouglasdev](https://community.apollographql.com/u/michaeldouglasdev)
#### Post date: [April 19, 2024, 1:19pm UTC](https://community.apollographql.com/t/apollogateway-with-defer/7399/3 "2024-04-19T13:19:52Z")
Im using Apollo Gateway because I have some LocalGraphQLDataSources.
Any suggestions for me to use router with LocalGraphQLDataSource? (local resolver and local schema)
---
### Author:  [@abernix](https://community.apollographql.com/u/abernix)
#### Post date: [April 22, 2024, 12:03pm UTC](https://community.apollographql.com/t/apollogateway-with-defer/7399/4 "2024-04-22T12:03:09Z")
@michaeldouglasdev We do not have an official recommendation for writing resolvers into the Router itself. `LocalGraphQLDataSource` was initially primarily intended to be used for testing but, overall, just wasn’t a very popular request since it prevented more practical and necessary independent scaling of subgraph services. There are some use-cases where it could make though!
We **don’t** recommend doing this at this time, however, creating something similar to `@apollo/gateway`’s `LocalGraphQLDataSource` with a truly local resolver and local schema in the Router **could** be achieved by using a Rust-GraphQL library (like `async-graphql`) and using the “`ControlFlow::Break`” pattern in a `subgraph_service` Router plugin. Alternatively, you maybe be able to do this as a coprocessor, but we would generally just recommend externalizing this to a minimal subgraph that lives along-side the Router (as a side-car in Kubernetes-land, or potentially a separate service if it necessitates it) which facilitates observing and scaling such a subgraph separately from the Router itself.
Hope this helps guide you in that direction should you choose to. As mentioned the Gateway does not support `@defer`.
---
### Author:  [@shanemyrick](https://community.apollographql.com/u/shanemyrick)
#### Post date: [April 24, 2024, 4:43pm UTC](https://community.apollographql.com/t/apollogateway-with-defer/7399/5 "2024-04-24T16:43:16Z")
You could implement an override subgraph with Router coprocessors too: [https://www.apollographql.com/docs/router/customizations/coprocessor/](https://www.apollographql.com/docs/router/customizations/coprocessor/)