我正在尝试更改我的数据库模型，因此我遵循了本教程。顺便说一句，我正在使用 Grails 1.3.7。
我跑了：
grails install-plugin database-migration
它安装得很好！
但是当我跑的时候：
dbm-generate-gorm-changelog changelog.groovy
它给了我以下错误：
java.io.FileNotFoundException: grails-app\migrations\changelog.groovy (The system cannot find the path specified)
at java.io.FileOutputStream.open(Native Method)
at java.io.FileOutputStream.<init>(FileOutputStream.java:212)
at java.io.FileOutputStream.<init>(FileOutputStream.java:165)
at java.io.FileWriter.<init>(FileWriter.java:90)
at _DatabaseMigrationCommon_groovy$_run_closure7.doCall(_DatabaseMigrationCommon_groovy:128)
at _DatabaseMigrationCommon_groovy$_run_closure7.call(_DatabaseMigrationCommon_groovy)
at DbmGenerateGormChangelog$_run_closure1_closure2.doCall(DbmGenerateGormChangelog:28)
at DbmGenerateGormChangelog$_run_closure1_closure2.doCall(DbmGenerateGormChangelog)
at _DatabaseMigrationCommon_groovy$_run_closure6_closure18.doCall(_DatabaseMigrationCommon_groovy:88)
at _DatabaseMigrationCommon_groovy$_run_closure6_closure18.doCall(_DatabaseMigrationCommon_groovy)
at grails.plugin.databasemigration.MigrationUtils.executeInSession(MigrationUtils.groovy:99)
at grails.plugin.databasemigration.MigrationUtils$executeInSession.call(Unknown Source)
at _DatabaseMigrationCommon_groovy$_run_closure6.doCall(_DatabaseMigrationCommon_groovy:81)
at _DatabaseMigrationCommon_groovy$_run_closure6.call(_DatabaseMigrationCommon_groovy)
at DbmGenerateGormChangelog$_run_closure1.doCall(DbmGenerateGormChangelog:27)
at gant.Gant$_dispatch_closure5.doCall(Gant.groovy:381)
at gant.Gant$_dispatch_closure7.doCall(Gant.groovy:415)
at gant.Gant$_dispatch_closure7.doCall(Gant.groovy)
at gant.Gant.withBuildListeners(Gant.groovy:427)
at gant.Gant.this$2$withBuildListeners(Gant.groovy)
at gant.Gant$this$2$withBuildListeners.callCurrent(Unknown Source)
at gant.Gant.dispatch(Gant.groovy:415)
at gant.Gant.this$2$dispatch(Gant.groovy)
at gant.Gant.invokeMethod(Gant.groovy)
at gant.Gant.executeTargets(Gant.groovy:590)
at gant.Gant.executeTargets(Gant.groovy:589)