migration

问题 I have created a multimodule project with the following structure myproject |- mymodule |- src |- main |- java |- com |- mymodule |- Util.java |-newmodule |-src |-main |-java |-com |-newmodule |- Main.java |-module-info.java Now i want to use Util.java which is a non modularized code in a modularized module newmodule. i have declared following in newmodule module newmodule { requires mymodule; } Project is compiling fine, but Intellij is showing module not found and package com.mymodule is

问题 I just overhauled my codebase to use the new facebook-ios-sdk 3.0 (from the previous version, 2.x or whatnot). Everything worked great, until I realized I hadn't accounted for users who had already granted the app permission/logged in with the previous implementation of the SDK. So I tried checking to see if the accessToken was saved in NSUserDefaults, and if so, make a call to open a session: if ([[NSUserDefaults standardUserDefaults] objectForKey:@"FBAccessTokenKey"] && [[NSUserDefaults

问题 I have a problem with dropping some foreign keys from my Laravel application. The problem is when I am trying to rollback the migration: php artisan migrate:rollback I don't know why I have errors in the console: [Illuminate\Database\QueryException] SQLSTATE[42000]: Syntax error or access violation: 1091 Can't DROP 'role_user_user_id_foreign'; check that column/key exists (SQL: alter table role_user drop foreign key role_user_user_id_foreign ) [Doctrine\DBAL\Driver\PDOException] SQLSTATE

问题 When I use references :foo in a migration, the column that's generated is called foo_id . Is there actually any difference between doing references :foo and just doing integer :foo_id ? Maybe something going on under the hood to enforce the relationship at the database level? 回答1: The result is the same for your specific case; you are correct. But references allows for a :polymorphic => true option which will automatically create the foo_type column as a string in the table. Semantically,

问题 Now that Bazel (http://bazel.io/) has been opensourced, is there an incremental process by which I can gradually migrate (a large repository) from Maven to Bazel? 回答1: In the two years since Ulf responded, there's been a few efforts to assist with maven to bazel migration. In particular, the Bazel team is creating a tool to assist with this: https://github.com/bazelbuild/migration-tooling The tool generates expansive WORKSPACE files from a set of pom files or maven coordinates. In the ideal

问题 I have simple Laravel migration file specifying a composite primary key : // ... public function up() { Schema::create('my_super_long_table_name', function($table) { $table->integer('column_1'); $table->integer('column_2'); $table->integer('column_3'); $table->primary(['column_1', 'column_2', 'column_3']); }); } // ... And when running php artisan migrate this error is thrown : SQLSTATE[42000]: Syntax error or access violation: 1059 Identifier name 'my_super_long_table_name_column_1_column_2

问题 I'm building a dummy site to test Laravel 3.x. I'm creating my site migrations right now. Everything was doing just fine until the following error showed up: SQLSTATE[42s02]: Base table or view not found: 1146 Table 'databasenamehere.prefix_laravel_migrations' doesn't exist The issue is that laravel all of a sudden started to prefix the 'laravel_migrations' table (when it is supposed to do it only with the other ones). I wonder if I'm doing something wrong or if it is a known issue. I'm

问题 This question already has answers here : How can I import Swift code to Objective-C? (15 answers) import swift class in objective-c, <myModule>-Swift.h file not found (8 answers) Closed 3 years ago . I'm trying to use the Swift class in my Object-c project. So far I have created the Objective-C project and imported the swift class and it asked me Would you like to configure an Objective-C bridging header?, then I hit Create Bridging Header so the productname-Bridging-Header.h file is created.

问题 I'm trying to make validations for the users in my app but every time i try to migrate something or run a rake test it constantly gives me this error: rake aborted! ActiveRecord::PendingMigrationError: Migrations are pending. To resolve this issue, run: bin/rake db:migrate RAILS_ENV=test then when I run the command " bin/rake db:migrate RAILS_ENV=test" it says permission denied. Can someone please help me! ( Im working in cloud9 and following the Mhartl guide currently on chapter 6) 回答1: You

问题 Is it possible to create a migration in Laravel 4 from an existing database? 回答1: Here is the linked script, that does, what is asked here. I also found this tool (actually a Gist code) and I highly prefer it for its simplicity. 来源： https://stackoverflow.com/questions/23514679/create-migration-from-existing-database-in-laravel-4