Update PostgresStorageAdapter.js (parse-community#6275)

* Update PostgresStorageAdapter.js

Improving use of the `await.async` notation in relation to `pg-promise`, and in general.

* Update PostgresStorageAdapter.js

* Update PostgresStorageAdapter.js

Correcting some results.

* Update PostgresStorageAdapter.js

Author: vitaly-t

src/Adapters/Storage/Postgres/PostgresStorageAdapter.js

@@ -829,9 +829,9 @@ export class PostgresStorageAdapter implements StorageAdapter {
     this._client.$pool.end();
   }
 
-  _ensureSchemaCollectionExists(conn: any) {
+  async _ensureSchemaCollectionExists(conn: any) {
     conn = conn || this._client;
-    return conn
+    await conn
       .none(
         'CREATE TABLE IF NOT EXISTS "_SCHEMA" ( "className" varChar(120), "schema" jsonb, "isParseClass" bool, PRIMARY KEY ("className") )'
       )
@@ -848,17 +848,17 @@ export class PostgresStorageAdapter implements StorageAdapter {
       });
   }
 
-  classExists(name: string) {
+  async classExists(name: string) {
     return this._client.one(
       'SELECT EXISTS (SELECT 1 FROM information_schema.tables WHERE table_name = $1)',
       [name],
       a => a.exists
     );
   }
 
-  setClassLevelPermissions(className: string, CLPs: any) {
+  async setClassLevelPermissions(className: string, CLPs: any) {
     const self = this;
-    return this._client.task('set-class-level-permissions', async t => {
+    await this._client.task('set-class-level-permissions', async t => {
       await self._ensureSchemaCollectionExists(t);
       const values = [
         className,
@@ -867,13 +867,13 @@ export class PostgresStorageAdapter implements StorageAdapter {
         JSON.stringify(CLPs),
       ];
       await t.none(
-        `UPDATE "_SCHEMA" SET $2:name = json_object_set_key($2:name, $3::text, $4::jsonb) WHERE "className"=$1`,
+        `UPDATE "_SCHEMA" SET $2:name = json_object_set_key($2:name, $3::text, $4::jsonb) WHERE "className" = $1`,
         values
       );
     });
   }
 
-  setIndexesWithSchemaFormat(
+  async setIndexesWithSchemaFormat(
     className: string,
     submittedIndexes: any,
     existingIndexes: any = {},
@@ -923,7 +923,7 @@ export class PostgresStorageAdapter implements StorageAdapter {
         });
       }
     });
-    return conn.tx('set-indexes-with-schema-format', async t => {
+    await conn.tx('set-indexes-with-schema-format', async t => {
       if (insertedIndexes.length > 0) {
         await self.createIndexes(className, insertedIndexes, t);
       }
@@ -932,16 +932,16 @@ export class PostgresStorageAdapter implements StorageAdapter {
       }
       await self._ensureSchemaCollectionExists(t);
       await t.none(
-        'UPDATE "_SCHEMA" SET $2:name = json_object_set_key($2:name, $3::text, $4::jsonb) WHERE "className"=$1',
+        'UPDATE "_SCHEMA" SET $2:name = json_object_set_key($2:name, $3::text, $4::jsonb) WHERE "className" = $1',
         [className, 'schema', 'indexes', JSON.stringify(existingIndexes)]
       );
     });
   }
 
-  createClass(className: string, schema: SchemaType, conn: ?any) {
+  async createClass(className: string, schema: SchemaType, conn: ?any) {
     conn = conn || this._client;
     return conn
-      .tx('create-class', t => {
+      .tx('create-class', async t => {
         const q1 = this.createTable(className, schema, t);
         const q2 = t.none(
           'INSERT INTO "_SCHEMA" ("className", "schema", "isParseClass") VALUES ($<className>, $<schema>, true)',
@@ -954,6 +954,8 @@ export class PostgresStorageAdapter implements StorageAdapter {
           schema.fields,
           t
         );
+        // TODO: The test should not verify the returned value, and then
+        //  the method can be simplified, to avoid returning useless stuff.
         return t.batch([q1, q2, q3]);
       })
       .then(() => {
@@ -977,7 +979,7 @@ export class PostgresStorageAdapter implements StorageAdapter {
   }
 
   // Just create a table, do not insert in schema
-  createTable(className: string, schema: SchemaType, conn: any) {
+  async createTable(className: string, schema: SchemaType, conn: any) {
     conn = conn || this._client;
     const self = this;
     debug('createTable', className, schema);
@@ -1042,12 +1044,12 @@ export class PostgresStorageAdapter implements StorageAdapter {
     });
   }
 
-  schemaUpgrade(className: string, schema: SchemaType, conn: any) {
+  async schemaUpgrade(className: string, schema: SchemaType, conn: any) {
     debug('schemaUpgrade', { className, schema });
     conn = conn || this._client;
     const self = this;
 
-    return conn.tx('schema-upgrade', async t => {
+    await conn.tx('schema-upgrade', async t => {
       const columns = await t.map(
         'SELECT column_name FROM information_schema.columns WHERE table_name = $<className>',
         { className },
@@ -1068,7 +1070,7 @@ export class PostgresStorageAdapter implements StorageAdapter {
     });
   }
 
-  addFieldIfNotExists(
+  async addFieldIfNotExists(
     className: string,
     fieldName: string,
     type: any,
@@ -1078,7 +1080,7 @@ export class PostgresStorageAdapter implements StorageAdapter {
     debug('addFieldIfNotExists', { className, fieldName, type });
     conn = conn || this._client;
     const self = this;
-    return conn.tx('add-field-if-not-exists', async t => {
+    await conn.tx('add-field-if-not-exists', async t => {
       if (type.type !== 'Relation') {
         try {
           await t.none(
@@ -1091,7 +1093,7 @@ export class PostgresStorageAdapter implements StorageAdapter {
           );
         } catch (error) {
           if (error.code === PostgresRelationDoesNotExistError) {
-            return await self.createClass(
+            return self.createClass(
               className,
               { fields: { [fieldName]: type } },
               t
@@ -1128,7 +1130,7 @@ export class PostgresStorageAdapter implements StorageAdapter {
 
   // Drops a collection. Resolves with true if it was a Parse Schema (eg. _User, Custom, etc.)
   // and resolves with false if it wasn't (eg. a join table). Rejects if deletion was impossible.
-  deleteClass(className: string) {
+  async deleteClass(className: string) {
     const operations = [
       { query: `DROP TABLE IF EXISTS $1:name`, values: [className] },
       {
@@ -1142,12 +1144,12 @@ export class PostgresStorageAdapter implements StorageAdapter {
   }
 
   // Delete all data known to this adapter. Used for testing.
-  deleteAllClasses() {
+  async deleteAllClasses() {
     const now = new Date().getTime();
     const helpers = this._pgp.helpers;
     debug('deleteAllClasses');
 
-    return this._client
+    await this._client
       .task('delete-all-classes', async t => {
         try {
           const results = await t.any('SELECT * FROM "_SCHEMA"');
@@ -1196,7 +1198,7 @@ export class PostgresStorageAdapter implements StorageAdapter {
   // may do so.
 
   // Returns a Promise.
-  deleteFields(
+  async deleteFields(
     className: string,
     schema: SchemaType,
     fieldNames: string[]
@@ -1218,9 +1220,9 @@ export class PostgresStorageAdapter implements StorageAdapter {
       })
       .join(', DROP COLUMN');
 
-    return this._client.tx('delete-fields', async t => {
+    await this._client.tx('delete-fields', async t => {
       await t.none(
-        'UPDATE "_SCHEMA" SET "schema"=$<schema> WHERE "className"=$<className>',
+        'UPDATE "_SCHEMA" SET "schema" = $<schema> WHERE "className" = $<className>',
         { schema, className }
       );
       if (values.length > 1) {
@@ -1232,7 +1234,7 @@ export class PostgresStorageAdapter implements StorageAdapter {
   // Return a promise for all schemas known to this adapter, in Parse format. In case the
   // schemas cannot be retrieved, returns a promise that rejects. Requirements for the
   // rejection reason are TBD.
-  getAllClasses() {
+  async getAllClasses() {
     const self = this;
     return this._client.task('get-all-classes', async t => {
       await self._ensureSchemaCollectionExists(t);
@@ -1245,10 +1247,10 @@ export class PostgresStorageAdapter implements StorageAdapter {
   // Return a promise for the schema with the given name, in Parse format. If
   // this adapter doesn't know about the schema, return a promise that rejects with
   // undefined as the reason.
-  getClass(className: string) {
+  async getClass(className: string) {
     debug('getClass', className);
     return this._client
-      .any('SELECT * FROM "_SCHEMA" WHERE "className"=$<className>', {
+      .any('SELECT * FROM "_SCHEMA" WHERE "className" = $<className>', {
         className,
       })
       .then(result => {
@@ -1261,7 +1263,7 @@ export class PostgresStorageAdapter implements StorageAdapter {
   }
 
   // TODO: remove the mongo format dependency in the return value
-  createObject(
+  async createObject(
     className: string,
     schema: SchemaType,
     object: any,
@@ -1426,7 +1428,7 @@ export class PostgresStorageAdapter implements StorageAdapter {
   // Remove all objects that match the given Parse Query.
   // If no objects match, reject with OBJECT_NOT_FOUND. If objects are found and deleted, resolve with undefined.
   // If there is some other error, reject with INTERNAL_SERVER_ERROR.
-  deleteObjectsByQuery(
+  async deleteObjectsByQuery(
     className: string,
     schema: SchemaType,
     query: QueryType,
@@ -1469,7 +1471,7 @@ export class PostgresStorageAdapter implements StorageAdapter {
     return promise;
   }
   // Return value not currently well specified.
-  findOneAndUpdate(
+  async findOneAndUpdate(
     className: string,
     schema: SchemaType,
     query: QueryType,
@@ -1487,7 +1489,7 @@ export class PostgresStorageAdapter implements StorageAdapter {
   }
 
   // Apply the update to all objects that match the given Parse Query.
-  updateObjectsByQuery(
+  async updateObjectsByQuery(
     className: string,
     schema: SchemaType,
     query: QueryType,
@@ -1980,7 +1982,7 @@ export class PostgresStorageAdapter implements StorageAdapter {
   // As such, we shouldn't expose this function to users of parse until we have an out-of-band
   // Way of determining if a field is nullable. Undefined doesn't count against uniqueness,
   // which is why we use sparse indexes.
-  ensureUniqueness(
+  async ensureUniqueness(
     className: string,
     schema: SchemaType,
     fieldNames: string[]
@@ -2016,7 +2018,7 @@ export class PostgresStorageAdapter implements StorageAdapter {
   }
 
   // Executes a count.
-  count(
+  async count(
     className: string,
     schema: SchemaType,
     query: QueryType,
@@ -2055,7 +2057,7 @@ export class PostgresStorageAdapter implements StorageAdapter {
       });
   }
 
-  distinct(
+  async distinct(
     className: string,
     schema: SchemaType,
     query: QueryType,
@@ -2121,7 +2123,7 @@ export class PostgresStorageAdapter implements StorageAdapter {
       );
   }
 
-  aggregate(className: string, schema: any, pipeline: any) {
+  async aggregate(className: string, schema: any, pipeline: any) {
     debug('aggregate', className, pipeline);
     const values = [className];
     let index: number = 2;
@@ -2323,7 +2325,7 @@ export class PostgresStorageAdapter implements StorageAdapter {
       });
   }
 
-  performInitialization({ VolatileClassesSchemas }: any) {
+  async performInitialization({ VolatileClassesSchemas }: any) {
     // TODO: This method needs to be rewritten to make proper use of connections (@vitaly-t)
     debug('performInitialization');
     const promises = VolatileClassesSchemas.map(schema => {
@@ -2362,7 +2364,7 @@ export class PostgresStorageAdapter implements StorageAdapter {
       });
   }
 
-  createIndexes(className: string, indexes: any, conn: ?any): Promise<void> {
+  async createIndexes(className: string, indexes: any, conn: ?any): Promise<void> {
     return (conn || this._client).tx(t =>
       t.batch(
         indexes.map(i => {
@@ -2376,43 +2378,43 @@ export class PostgresStorageAdapter implements StorageAdapter {
     );
   }
 
-  createIndexesIfNeeded(
+  async createIndexesIfNeeded(
     className: string,
     fieldName: string,
     type: any,
     conn: ?any
   ): Promise<void> {
-    return (conn || this._client).none(
+    await (conn || this._client).none(
       'CREATE INDEX $1:name ON $2:name ($3:name)',
       [fieldName, className, type]
     );
   }
 
-  dropIndexes(className: string, indexes: any, conn: any): Promise<void> {
+  async dropIndexes(className: string, indexes: any, conn: any): Promise<void> {
     const queries = indexes.map(i => ({
       query: 'DROP INDEX $1:name',
       values: i,
     }));
-    return (conn || this._client).tx(t =>
+    await (conn || this._client).tx(t =>
       t.none(this._pgp.helpers.concat(queries))
     );
   }
 
-  getIndexes(className: string) {
+  async getIndexes(className: string) {
     const qs = 'SELECT * FROM pg_indexes WHERE tablename = ${className}';
     return this._client.any(qs, { className });
   }
 
-  updateSchemaWithIndexes(): Promise<void> {
+  async updateSchemaWithIndexes(): Promise<void> {
     return Promise.resolve();
   }
 
   // Used for testing purposes
-  updateEstimatedCount(className: string) {
+  async updateEstimatedCount(className: string) {
     return this._client.none('ANALYZE $1:name', [className]);
   }
 
-  createTransactionalSession(): Promise<any> {
+  async createTransactionalSession(): Promise<any> {
     return new Promise(resolve => {
       const transactionalSession = {};
       transactionalSession.result = this._client.tx(t => {