Function generateMutation

src/utils/mutation.ts:14–51

({
  type,
  provider,
  entity,
  schemaMap,
}: {
  type: 'add' | 'update'
  provider: string
  entity: Entity
  schemaMap: SchemaMap | undefined
})

  ((schemaMap && schemaMap[entity.name]) || entity.className) as string

export function generateMutation({
  type,
  provider,
  entity,
  schemaMap,
}: {
  type: 'add' | 'update'
  provider: string
  entity: Entity
  schemaMap: SchemaMap | undefined
}): string {
  const service: string = getResourceNameForMutationGenerator(entity, schemaMap)
  const capitalizedType = capitalizeString(type)
  // cases: add(upsert), update(update)
  // input names are different for upsert and update
  const mutationVarName = type === 'add' ? '$input' : '$patch'
  const providerServiceString = service.includes(provider)
    ? service
    : `${provider}${capitalizeString(service)}`
  // We get the mutation type name for this mutation
  const mutationInputTypeName = `${capitalizedType}${providerServiceString}Input`
  // When upserting we insert several entities at a time
  // Whereas updating we update edges for one entity at a time
  const mutationInputType =
    type === 'add'
      ? `[${mutationInputTypeName}!]!`
      : `${mutationInputTypeName}!`
  // Add the upsert boolean if the mutation is an upsert
  const mutationAdditionalArgs = type === 'add' ? ',upsert:true' : ''
  // For upsert we tell the mutation to return the number of affected nodes
  // For update we pass the query that filter the node in order to update its edges
  const internalQuery =
    type === 'add' ? 'numUids' : `${providerServiceString}{id}`
  // And we put everything together
  // eslint-disable-next-line max-len
  const mutation = `mutation(${mutationVarName}:${mutationInputType}){${type}${providerServiceString}(input:${mutationVarName}${mutationAdditionalArgs}){${internalQuery}}}`
  return mutation
}

export const generateUpdateVarsObject = (
  service: any,