In my current project, I am working on integrating multiple remote schemas within a gateway service and expanding types from these schemas. To accomplish this, I am utilizing the `mergeSchemas` function from `graphql-tools`. This allows me to specify necessary fragments and custom resolvers to delegate to the appropriate schemas. One crucial part of this implementation involves:
const typeExtensions = `
extend type VsStatistics {
commonCompetitors(filter: DateRangeFilter): [Player!]!
}
`
const mergedSchema = mergeSchemas({
schemas: [ playerSchema, resultsSchema, typeExtensions ],
resolvers: {
VsStatistics: {
commonCompetitors: {
fragment: `fragment CommonCompetitorsFragment on VsStatistics { commonCompetitionIds }`,
resolve (parent, _args, context, info) {
return info.mergeInfo.delegateToSchema({
schema: playerSchema,
operation: 'query',
fieldName: 'players',
args: { idArray: parent.commonCompetitionIds },
context,
info
})
}
}
}
}
})
The attribute `commonCompetitionIds` is an array of IDs found in the VsStatistics object. Everything works smoothly when I don't need to pass any parameters to the fragment as illustrated above. However, I recently introduced a new filter argument of type `DateRangeFilter` to `commonCompetitionIds`. The extension `commonCompetitors` now accepts this filter as an argument, and I must find a way to pass it into the fragment to apply the filter to `commonCompetitionIds`. I attempted the following...
commonCompetitors: {
fragment: `fragment CommonCompetitorsFragment on VsStatistics { commonCompetitionIds(filter: $filter) }`
...
...hoping that the parent's arguments would automatically be accessible to the fragment. Unfortunately, I received an error stating `Variable "$filter" is not defined`. How can I successfully pass this filter into the fragment to retrieve the filtered `commonCompetitionIds` for use in the resolver?