Adding a query to get a single Event using a designator

server/src/schema/queries/Event.js

@@ -0,0 +1,35 @@
+import {
+  GraphQLNonNull,
+  GraphQLID
+} from 'graphql'
+import { DatabaseError } from '../../errors'
+import { EventType } from '../types'
+import { Event } from '../../models'
+
+const args = {
+  designator: { type: new GraphQLNonNull(GraphQLID) }
+}
+
+const resolve = (parent, { designator }, context) => {
+  return new Promise((resolve, reject) => {
+    Event.findOne({ designator }).exec((err, event) => {
+      if (err) {
+        reject(err)
+      } else if (!event) {
+        reject(new DatabaseError('None of the events respond to that designator'))
+      } else {
+        resolve(event)
+      }
+    })
+  })
+}
+
+const query = {
+  event: {
+    type: EventType,
+    args,
+    resolve
+  }
+}
+
+export default query

server/src/schema/queries/index.js

@@ -2,6 +2,7 @@ import {
   GraphQLObjectType
 } from 'graphql'
 
+import EventQuery from './Event'
 import EventsQuery from './Events'
 import EventsByHostQuery from './EventsByHost'
 import EventsByTeamQuery from './EventsByTeam'
@@ -11,6 +12,7 @@ import PlottersQuery from './Plotters'
 const RootQuery = new GraphQLObjectType({
   name: 'RootQueryType',
   fields: Object.assign(
+    EventQuery,
     EventsQuery,
     EventsByHostQuery,
     EventsByTeamQuery,