在主要/副本上下文中创建和迁移设计的用户模型
以下主/复制数据库结构
development:
primary:
<<: *default
database: users_development
username: deploy_root
password: password
host: "localhost"
migrations_paths: db/user_migrate
primary_replica:
<<: *default
database: users_development
username: deploy_readonly
password: password
host: "localhost"
replica: true
已定义为其主要AR定义为：
class ApplicationRecord < ActiveRecord::Base
self.abstract_class = true
connects_to database: { writing: :primary, reading: :primary_replica }
end
但是，当运行以下命令遵循导轨指南所建议的语法
rails generate devise User nick avatar --database users
bin/rails db:migrate
唯一的响应是提示。出现了两个问题：
迁移是创建的，但不是在适当的目录
migrations_paths：db/user_migrate登录到数据库
user_development =＃\ dt返回，一致地与提示回复没有找到任何关系。换句话说，该表未创建（由 schema.rb文件确认，文件未更改
指定oprizations_paths用子目录一个错误的错误数据库连接？
还是Rails应该生成设计用户Nick Avatar -Database用户 Indoke 主代替用户？
The following main/replica database structure
development:
primary:
<<: *default
database: users_development
username: deploy_root
password: password
host: "localhost"
migrations_paths: db/user_migrate
primary_replica:
<<: *default
database: users_development
username: deploy_readonly
password: password
host: "localhost"
replica: true
has defined as its main AR defined as:
class ApplicationRecord < ActiveRecord::Base
self.abstract_class = true
connects_to database: { writing: :primary, reading: :primary_replica }
end
However, when The following commands are run following the suggested syntax by the rails guides
rails generate devise User nick avatar --database users
bin/rails db:migrate
the only response is a prompt. Two problems arise:
the migration is created but not in the proper directory
migrations_paths: db/user_migrateLogging into the database
users_development=# \dtreturns, consistently with the prompt replyDid not find any relations.In other words the table was not created (which is confirmed by theschema.rbfile being unaltered
is specifying migrations_paths with a sub directory a mistake for the primary database connection?
Or should rails generate devise User nick avatar --database users invoke primary in lieu of users?
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假定主要数据库在
迁移目录中具有其迁移，而不是子目录。运行
Rails生成使用- 数据库name_of_primary_database将按照单个数据库应用程序进行。虽然，这个观察者会喜欢以类似方式组织所有迁移，但是
migrations_paths对于主要数据库不允许。The primary database is assumed to have its migrations in the
migratedirectory, not a sub-directory.Running a
rails generatewith--database name_of_primary_databasewill proceed as in single database application.Although, this observer would have enjoyed that all migrations be organised in a similar manner,
migrations_pathsis not allowed for a primary database.