Fixes issue related to flow types

Author: flovilmart

src/Adapters/Storage/Mongo/MongoStorageAdapter.js

@@ -161,7 +161,7 @@ export class MongoStorageAdapter implements StorageAdapter {
     return this.connectionPromise;
   }
 
-  handleError<T>(error: ?Error): Promise<T> {
+  handleError<T>(error: ?(Error | Parse.Error)): Promise<T> {
     if (error && error.code === 13) { // Unauthorized error
       delete this.client;
       delete this.database;

src/Adapters/Storage/Postgres/PostgresStorageAdapter.js

@@ -611,6 +611,9 @@ const buildWhereClause = ({ schema, query, index }) => {
 }
 
 export class PostgresStorageAdapter implements StorageAdapter {
+
+  canSortOnJoinTables: boolean;
+
   // Private
   _collectionPrefix: string;
   _client: any;
@@ -625,6 +628,7 @@ export class PostgresStorageAdapter implements StorageAdapter {
     const { client, pgp } = createClient(uri, databaseOptions);
     this._client = client;
     this._pgp = pgp;
+    this.canSortOnJoinTables = false;
   }
 
   handleShutdown() {
@@ -862,7 +866,7 @@ export class PostgresStorageAdapter implements StorageAdapter {
     return this._client.task('delete-all-classes', function * (t) {
       try {
         const results = yield t.any('SELECT * FROM "_SCHEMA"');
-        const joins = results.reduce((list, schema) => {
+        const joins = results.reduce((list: Array<string>, schema: any) => {
           return list.concat(joinTablesForSchema(schema.schema));
         }, []);
         const classes = ['_SCHEMA', '_PushStatus', '_JobStatus', '_JobSchedule', '_Hooks', '_GlobalConfig', '_Audience', ...results.map(result => result.className), ...joins];
@@ -895,7 +899,7 @@ export class PostgresStorageAdapter implements StorageAdapter {
   // Returns a Promise.
   deleteFields(className: string, schema: SchemaType, fieldNames: string[]): Promise<void> {
     debug('deleteFields', className, fieldNames);
-    fieldNames = fieldNames.reduce((list, fieldName) => {
+    fieldNames = fieldNames.reduce((list: Array<string>, fieldName: string) => {
       const field = schema.fields[fieldName]
       if (field.type !== 'Relation') {
         list.push(fieldName);
@@ -1149,14 +1153,14 @@ export class PostgresStorageAdapter implements StorageAdapter {
       } else if (fieldName == 'authData') {
         // This recursively sets the json_object
         // Only 1 level deep
-        const generate = (jsonb, key, value) => {
+        const generate = (jsonb: string, key: string, value: any) => {
           return `json_object_set_key(COALESCE(${jsonb}, '{}'::jsonb), ${key}, ${value})::jsonb`;
         }
         const lastKey = `$${index}:name`;
         const fieldNameIndex = index;
         index += 1;
         values.push(fieldName);
-        const update = Object.keys(fieldValue).reduce((lastKey, key) => {
+        const update = Object.keys(fieldValue).reduce((lastKey: string, key: string) => {
           const str = generate(lastKey, `$${index}::text`, `$${index + 1}::jsonb`)
           index += 2;
           let value = fieldValue[key];
@@ -1265,7 +1269,7 @@ export class PostgresStorageAdapter implements StorageAdapter {
           return value && value.__op === 'Delete' && k.split('.').length === 2 && k.split(".")[0] === fieldName;
         }).map(k => k.split('.')[1]);
 
-        const deletePatterns = keysToDelete.reduce((p, c, i) => {
+        const deletePatterns = keysToDelete.reduce((p: string, c: string, i: number) => {
           return p + ` - '$${index + 1 + i}:value'`;
         }, '');
 

src/Adapters/Storage/StorageAdapter.js

@@ -24,6 +24,8 @@ export type UpdateQueryOptions = {
 export type FullQueryOptions = QueryOptions & UpdateQueryOptions;
 
 export interface StorageAdapter {
+  canSortOnJoinTables: boolean;
+
   classExists(className: string): Promise<boolean>;
   setClassLevelPermissions(className: string, clps: any): Promise<void>;
   createClass(className: string, schema: SchemaType): Promise<void>;