support pg-promise init options

spec/PostgresInitOptions.spec.js

@@ -0,0 +1,60 @@
+const Parse = require('parse/node').Parse;
+const PostgresStorageAdapter = require('../src/Adapters/Storage/Postgres/PostgresStorageAdapter');
+const postgresURI = 'postgres://localhost:5432/parse_server_postgres_adapter_test_database';
+
+//public schema
+const databaseOptions1 = {
+  initOptions: {
+    connect: function (client, dc, isFresh) {
+      if (isFresh) {
+        client.query('SET search_path = public');
+      }
+    }
+  }
+};
+
+//not exists schema
+const databaseOptions2 = {
+  initOptions: {
+    connect: function (client, dc, isFresh) {
+      if (isFresh) {
+        client.query('SET search_path = not_exists_schema');
+      }
+    }
+  }
+};
+
+const GameScore = Parse.Object.extend({
+  className: "GameScore"
+});
+
+describe('Postgres database init options', () => {
+  it('create server with public schema databaseOptions,shoud be ok', (done) => {
+    reconfigureServer({
+      databaseAdapter: new PostgresStorageAdapter({
+        uri: postgresURI, collectionPrefix: 'test_',
+        databaseOptions: databaseOptions1
+      })
+    }).then(done, fail);
+  });
+
+  it("save new GameScore in public schema", function (done) {
+    var score = new GameScore({ "score": 1337, "playerName": "Sean Plott", "cheatMode": false });
+    score.save().then(done, fail);
+  });
+
+  it('create server with not exists schema databaseOptions,shoud be fail', (done) => {
+    reconfigureServer({
+      databaseAdapter: new PostgresStorageAdapter({
+        uri: postgresURI, collectionPrefix: 'test_',
+        databaseOptions: databaseOptions2
+      })
+    }).then(() => {
+      done();
+    })
+      .catch(error => {
+        expect(error.code).toEqual('42P01');
+        done();
+      });
+  });
+});

src/Adapters/Storage/Postgres/PostgresClient.js

@@ -1,4 +1,4 @@
-const pgp = require('pg-promise')();
+
 const parser = require('./PostgresConfigParser');
 
 export function createClient(uri, databaseOptions) {
@@ -13,11 +13,13 @@ export function createClient(uri, databaseOptions) {
     dbOptions[key] = databaseOptions[key];
   }
 
+  const initOptions = dbOptions.initOptions || {};
+  const pgp = require('pg-promise')(initOptions);
   const client = pgp(dbOptions);
 
   if (dbOptions.pgOptions) {
     for (const key in dbOptions.pgOptions) {
-      client.pg.defaults[key] = dbOptions.pgOptions[key];
+      pgp.pg.defaults[key] = dbOptions.pgOptions[key];
     }
   }