@sap/cds/lib/srv/srv-resolve.js

SAP Cloud Application Programming Model - CDS for Node.js

const cds = require('../index')
const { resolveView, getTransition } = require('../../libx/_runtime/common/utils/resolveView')

module.exports = class Resolver {
  constructor(service) {
    this.service = service
  }

  // NOTE: used in ApplicationService.handle and RemoteService.handle
  query(query) {
    return resolveView(query, this.service)
  }

  // NOTE: used in lean-draft, odata stream middleware, and cds-dbs
  transitions(query) {
    const target = query && typeof query === 'object' ? cds.infer.target(query, this.service) || query?._target : undefined
    const _tx = typeof tx === 'function' ? cds.context?.tx : this.service
    const event = query?.INSERT ? 'INSERT' : query?.UPDATE ? 'UPDATE' : query?.DELETE ? 'DELETE' : undefined
    return getTransition(target, _tx, event)
  }
}