Question

我在MySQL中创建了一个复合键。该表格为ActionNoteCode，复合键由字段action_note_code和collection组成。我按照compound key in ebean and play framework上的示例进行了操作。

班级ActionNoteCode代码：

@Entity
public class ActionNoteCode extends Model {
    @EmbeddedId
    public ActionNoteCodeIndex id;
    String description = "";

    @Embeddable
    class ActionNoteCodeIndex {
        String acvtion_note_code;
        String collection;
    }
}

播放开始时会抛出以下错误：

Cannot register class [models.prospector.actionNote.ActionNoteCode$ActionNoteCodeIndex] in Ebean server

这表明您正在使用models文件夹/包：

ebean.default="models.*"

这是完整的堆栈跟踪：

play.api.Configuration$$anon$1: Configuration error[Cannot register class [models.prospector.actionNote.ActionNoteCode$ActionNoteCodeIndex] in Ebean server]
    at play.api.Configuration$.configError(Configuration.scala:156)
    at play.api.Configuration.reportError(Configuration.scala:809)
    at play.Configuration.reportError(Configuration.java:368)
    at play.db.ebean.DefaultEbeanConfig$EbeanConfigParser.addModelClassesToServerConfig(DefaultEbeanConfig.java:107)
    at play.db.ebean.DefaultEbeanConfig$EbeanConfigParser.parse(DefaultEbeanConfig.java:82)
    at play.db.ebean.DefaultEbeanConfig$EbeanConfigParser.get(DefaultEbeanConfig.java:56)
    at play.db.ebean.DefaultEbeanConfig$EbeanConfigParser.get(DefaultEbeanConfig.java:40)
    at com.google.inject.internal.ProviderInternalFactory.provision(ProviderInternalFactory.java:81)
    at com.google.inject.internal.BoundProviderFactory.provision(BoundProviderFactory.java:72)
    at com.google.inject.internal.ProviderInternalFactory.circularGet(ProviderInternalFactory.java:61)
Caused by: java.lang.VerifyError: Bad type on operand stack
Exception Details:
Location:
models/prospector/actionNote/ActionNoteCode$ActionNoteCodeIndex.<init>(Lmodels/prospector/actionNote/ActionNoteCode;)V @2: invokevirtual
Reason:
  Type uninitializedThis (current frame, stack[0]) is not assignable to 'models/prospector/actionNote/ActionNoteCode$ActionNoteCodeIndex'
Current Frame:
bci: @2
flags: { flagThisUninit }
locals: { uninitializedThis, 'models/prospector/actionNote/ActionNoteCode' }
stack: { uninitializedThis, 'models/prospector/actionNote/ActionNoteCode' }
Bytecode:
0x0000000: 2a2b b600 202a b700 232a bb00 2559 2ab7
0x0000010: 0028 b500 2ab1                         
    at java.lang.Class.forName0(Native Method)
    at java.lang.Class.forName(Class.java:348)
    at play.db.ebean.DefaultEbeanConfig$EbeanConfigParser.addModelClassesToServerConfig(DefaultEbeanConfig.java:105)
    at play.db.ebean.DefaultEbeanConfig$EbeanConfigParser.parse(DefaultEbeanConfig.java:82)
    at play.db.ebean.DefaultEbeanConfig$EbeanConfigParser.get(DefaultEbeanConfig.java:56)
    at play.db.ebean.DefaultEbeanConfig$EbeanConfigParser.get(DefaultEbeanConfig.java:40)
    at com.google.inject.internal.ProviderInternalFactory.provision(ProviderInternalFactory.java:81)
    at com.google.inject.internal.BoundProviderFactory.provision(BoundProviderFactory.java:72)
    at com.google.inject.internal.ProviderInternalFactory.circularGet(ProviderInternalFactory.java:61)
    at com.google.inject.internal.BoundProviderFactory.get(BoundProviderFactory.java:62)

Answer 1

1-尝试让您的课程保持静态，public static class ActionNoteCodeIndex。

2 - 如果它不起作用，请将类ActionNoteCodeIndex移到单独的文件中。我想它确实有所作为，因为ebean扫描文件以便使用它们。

使用Ebean和PlayFramework复合键

1 个答案: