Play框架2.4.3演变未触发 [英] Play framework 2.4.3 evolutions not triggered

问题描述

我正在做玩游戏的教程.当我在conf/evolutions/default/1.sql中创建演变时，什么都没有发生.我刚刚得到了有意义的异常JdbcSQLException: Table "TASK" not found.

I'm doing the todo tutorial of Play. When I created the evolution in conf/evolutions/default/1.sql nothing happens. I just get the Exception JdbcSQLException: Table "TASK" not found which makes sense.

我使用激活器控制台中的h2-browser将演变手动应用于数据库，然后它起作用了.但是进化不会自动出现.

I applied the evolution manually to the DB with h2-browser in activator console and after that it works. But the evolutions don't show up automatically.

application.conf

application.conf

# Database configuration
# ~~~~~
# You can declare as many datasources as you want.
# By convention, the default datasource is named `default`
#
db.default.driver=org.h2.Driver
db.default.url="jdbc:h2:mem:play"
db.default.username=sa
db.default.password=""

# New
evolutionplugin=enabled
applyEvolutions.db=true
applyEvolutions.default=true
applyDownEvolutions.default=true

# Evolutions
# ~~~~~
# You can disable evolutions if needed
# play.evolutions.enabled=false

# You can disable evolutions for a specific datasource if necessary
# play.evolutions.db.default.enabled=false

1.sql

# Tasks schema

# --- !Ups

CREATE SEQUENCE task_id_seq;
CREATE TABLE task (
    id integer NOT NULL DEFAULT nextval('task_id_seq'),
    label varchar(255)
);

# --- !Downs

DROP TABLE task;
DROP SEQUENCE task_id_seq;

推荐答案

好.我阅读了迁移文档，必须将libraryDependencies += evolutions应用于build.sbt

Ok. I read the migration docs and one has to apply libraryDependencies += evolutions to build.sbt.

然后它像预期的那样工作.

Then it works like expected.

这些不是必需的，它们将自动应用演变(不显示Database 'default' needs evolution!):

These are not necessary, they will apply the evolution automatically (without showing the Database 'default' needs evolution!):

applyEvolutions.db=true
applyEvolutions.default=true
applyDownEvolutions.default=true

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