Question

当我在Domain类中拥有ID时，它工作正常

class Book {
    int id
    String bookAuthor

    static constraints = {
        bookAuthor blank: false, maxSize:30
    }

    static mapping = {    
        version false
        id generator: 'sequence',
        params: [sequence:'s_book_seq']
    }
}

但是一旦我尝试将Id映射到BookId，

class Book {
    int bookId
    String bookAuthor

    static constraints = {
        bookAuthor blank: false, maxSize:30         
    }

    static mapping = {
        version false
        id generator: 'sequence',
        params: [sequence:'s_book_seq'], column :'bookId'
    }
}

然后Grails将无法启动我的应用程序。如何将ID映射到不同的字段？我得到的 error 是：

 Error|
 2014-12-27 00:16:01,293 [http-bio-8080-exec-4] ERROR spi.SqlExceptionHelper  - ORA-00904: "THIS_"."B
    OOK_ID": invalid identifier
    Error |
    2014-12-27 00:16:01,412 [http-bio-8080-exec-4] ERROR errors.GrailsExceptionResolver  - SQLSyntaxErro
    rException occurred when processing request: [GET] /gTunes/book/index
    ORA-00904: "THIS_"."BOOK_ID": invalid identifier
    . Stacktrace follows:
    Message: ORA-00904: "THIS_"."BOOK_ID": invalid identifier
        Line | Method
    ->>  445 | processError         in oracle.jdbc.driver.T4CTTIoer
    - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
    |    396 | processError         in     ''
    |    879 | processError . . . . in oracle.jdbc.driver.T4C8Oall
    |    450 | receive              in oracle.jdbc.driver.T4CTTIfun
    |    192 | doRPC . . . . . . .  in     ''
    |    531 | doOALL               in oracle.jdbc.driver.T4C8Oall
    |    207 | doOall8 . . . . . .  in oracle.jdbc.driver.T4CPreparedStatement
    |    884 | executeForDescribe   in     ''
    |   1167 | executeMaybeDescribe in oracle.jdbc.driver.OracleStatement
    |   1289 | doExecuteWithTimeout in     ''
    |   3584 | executeInternal . .  in oracle.jdbc.driver.OraclePreparedStatement
    |   3628 | executeQuery         in     ''
    |   1493 | executeQuery . . . . in oracle.jdbc.driver.OraclePreparedStatementWrapper
    |     43 | <init>               in grails.orm.PagedResultList
    |     15 | $tt__index . . . . . in test.myapp.BookController
    |    189 | doFilter             in grails.plugin.cache.web.filter.PageFragmentCachingFilter
    |     63 | doFilter . . . . . . in grails.plugin.cache.web.filter.AbstractFilter
    |   1145 | runWorker            in java.util.concurrent.ThreadPoolExecutor
    |    615 | run . . . . . . . .  in java.util.concurrent.ThreadPoolExecutor$Worker
    ^    744 | run                  in java.lang.Thread

更新

moise2022的解决方案有效。我可以打开列表页面。但是，显示页面中生成的$ {bookInstance}是错误的。

<g:link class="edit" action="edit" resource="${bookInstance}"><g:message code="default.button.edit.label" default="Edit" /></g:link>

而不是

<a href="/gTunes/book/edit/1" class="edit">Edit</a>

它生成了

<a href="/gTunes/book/edit" class="edit">Edit</a>

所以编辑导航打破了

更新

删除我试图改变

<g:form url="[resource:bookInstance, action:'delete' ]" method="DELETE">

到

<g:form url="[resource:bookInstance, action:'delete', id:'${bookInstance.bookId}' ]" method="DELETE">

那仍然没有奏效。

URI:/gTunes/book/show/1Class:java.lang.IllegalArgumentExceptionMessage:named capturing group is missing trailing '}'
Around line 527 of grails-app\views\book\show.gsp


Around line 527 of AbstractFilter.java


Around line 50 of grails-app\views\book\show.gsp
47:                 <g:link class="edit" action="edit" id="${bookInstance.bookId}" ><g:message code="default.button.edit.label" default="Edit" /></g:link></td>48:                  <g:actionSubmit class="delete" action="delete" value="${message(code: 'default.button.delete.label', default: 'Delete')}" onclick="return confirm('${message(code: 'default.button.delete.confirm.message', default: 'Are you sure?')}');" />49:                </fieldset>50:          </g:form>51:        </div>52:   </body>53:</html>

Answer 1

使用name参数更改默认ID的名称。

static mapping = {
    id generator: 'sequence',
    params: [sequence:'s_book_seq'], 
    name: 'bookId'
}

检查文档here并阅读此post

如何将ID映射到Grails中的其他列？

1 个答案: