我正在尝试重写 Play！框架的YABE 教程，以便它可以使用 Siena 模块在 Google App Engine 上运行。我正在使用以下版本的播放和模块：
- 玩 1.2.5
- 克鲁兹耶纳 2.0.3
- 锡耶纳 2.0.7
- gae 1.6.0
我已成功设置应用程序，连接到数据库并能够将数据存储/检索到数据库。但是，我遇到了 Siena 模块提供的 @Text 注释的问题。它使用 Post.content 和 Comment.content 数据字段的 MediumText 数据类型正确创建数据库。下面是从 GAE 日志生成的 DDL：
# -----------------------------------------------------------------------
# Comment
# -----------------------------------------------------------------------
CREATE TABLE Comment
(
id VARCHAR(255) NOT NULL,
author VARCHAR(255) NULL,
postedAt DATETIME,
content MEDIUMTEXT NULL,
post VARCHAR(255) NULL,
PRIMARY KEY (id)
);
# -----------------------------------------------------------------------
# User
# -----------------------------------------------------------------------
CREATE TABLE User
(
id VARCHAR(255) NOT NULL,
email VARCHAR(255) NULL,
password VARCHAR(255) NULL,
fullname VARCHAR(255) NULL,
isAdmin TINYINT(1) DEFAULT false NOT NULL,
PRIMARY KEY (id)
);
# -----------------------------------------------------------------------
# Tag
# -----------------------------------------------------------------------
CREATE TABLE Tag
(
id VARCHAR(255) NOT NULL,
name VARCHAR(255) NULL,
PRIMARY KEY (id)
);
# -----------------------------------------------------------------------
# Post
# -----------------------------------------------------------------------
CREATE TABLE Post
(
id VARCHAR(255) NOT NULL,
title VARCHAR(255) NULL,
postedAt DATETIME,
content MEDIUMTEXT NULL,
author VARCHAR(255) NULL,
PRIMARY KEY (id)
);
我已经用 @Text 注释对我的 Post.content 字段进行了注释，因为我在一些要使用的板上看到了 Pascal 评论。我在下面发布了我的 Post 类以供参考：
package models;
import ...
public class Post extends Model {
...
@Text
@Required
@MaxSize(10000)
public String content;
...
}
正如我所提到的，一切都部署得很好，但是当我尝试将帖子保存到数据库时，我收到了以下堆栈跟踪：
play.Logger niceThrowable:
@6cm6cpabp
Internal Server Error (500)
Execution exception (In /app/controllers/Application.java around line 28)
RuntimeException occured : Cannot load fixture initial-data.yml: Unexpected Error
play.exceptions.JavaExecutionException: Cannot load fixture initial-data.yml: Unexpected Error
at play.mvc.ActionInvoker.invoke(ActionInvoker.java:237)
at play.server.ServletWrapper$ServletInvocation.execute(ServletWrapper.java:561)
at play.Invoker$Invocation.run(Invoker.java:278)
at play.server.ServletWrapper$ServletInvocation.run(ServletWrapper.java:552)
at play.Invoker.invokeInThread(Invoker.java:68)
at play.server.ServletWrapper.service(ServletWrapper.java:143)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1166)
at com.google.apphosting.utils.servlet.ParseBlobUploadFilter.doFilter(ParseBlobUploadFilter.java:102)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at com.google.apphosting.runtime.jetty.SaveSessionFilter.doFilter(SaveSessionFilter.java:35)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:43)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388)
at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)
at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)
at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418)
at com.google.apphosting.runtime.jetty.AppVersionHandlerMap.handle(AppVersionHandlerMap.java:266)
at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
at org.mortbay.jetty.Server.handle(Server.java:326)
at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542)
at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:923)
at com.google.apphosting.runtime.jetty.RpcRequestParser.parseAvailable(RpcRequestParser.java:76)
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
at com.google.apphosting.runtime.jetty.JettyServletEngineAdapter.serviceRequest(JettyServletEngineAdapter.java:146)
at com.google.apphosting.runtime.JavaRuntime$RequestRunnable.run(JavaRuntime.java:447)
at com.google.tracing.TraceContext$TraceContextRunnable.runInContext(TraceContext.java:454)
at com.google.tracing.TraceContext$TraceContextRunnable$1.run(TraceContext.java:461)
at com.google.tracing.TraceContext.runInContext(TraceContext.java:703)
at com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContextNoUnref(TraceContext.java:338)
at com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContext(TraceContext.java:330)
at com.google.tracing.TraceContext$TraceContextRunnable.run(TraceContext.java:458)
at com.google.apphosting.runtime.ThreadGroupPool$PoolEntry.run(ThreadGroupPool.java:251)
at java.lang.Thread.run(Thread.java:679)
Caused by: java.lang.RuntimeException: Cannot load fixture initial-data.yml: Unexpected Error
at play.modules.siena.SienaFixtures.loadModels(SienaFixtures.java:273)
at controllers.Application.index(Application.java:28)
at play.mvc.ActionInvoker.invokeWithContinuation(ActionInvoker.java:557)
at play.mvc.ActionInvoker.invoke(ActionInvoker.java:508)
at play.mvc.ActionInvoker.invokeControllerMethod(ActionInvoker.java:484)
at play.mvc.ActionInvoker.invokeControllerMethod(ActionInvoker.java:479)
at play.mvc.ActionInvoker.invoke(ActionInvoker.java:161)
at play.server.ServletWrapper$ServletInvocation.execute(ServletWrapper.java:561)
at play.Invoker$Invocation.run(Invoker.java:278)
at play.server.ServletWrapper$ServletInvocation.run(ServletWrapper.java:552)
at play.Invoker.invokeInThread(Invoker.java:68)
at play.server.ServletWrapper.service(ServletWrapper.java:143)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1166)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388)
at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)
at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)
at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418)
at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
at org.mortbay.jetty.Server.handle(Server.java:326)
at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542)
at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:923)
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
at com.google.tracing.TraceContext$TraceContextRunnable.runInContext(TraceContext.java:454)
at com.google.tracing.TraceContext$TraceContextRunnable$1.run(TraceContext.java:461)
at com.google.tracing.TraceContext.runInContext(TraceContext.java:703)
at com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContextNoUnref(TraceContext.java:338)
at com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContext(TraceContext.java:330)
at com.google.tracing.TraceContext$TraceContextRunnable.run(TraceContext.java:458)
... 1 more
Caused by: play.exceptions.UnexpectedException: Unexpected Error
at play.modules.siena.SienaModelUtils.edit(SienaModelUtils.java:301)
at play.modules.siena.SienaModelUtils.create(SienaModelUtils.java:58)
at play.modules.siena.SienaPlugin.bind(SienaPlugin.java:331)
at play.PlayPlugin.bind(PlayPlugin.java:68)
at play.plugins.PluginCollection.bind(PluginCollection.java:579)
at play.data.binding.Binder.bind(Binder.java:112)
at play.data.binding.Binder.bind(Binder.java:92)
at play.data.binding.Binder.bind(Binder.java:88)
at play.modules.siena.SienaFixtures.loadModels(SienaFixtures.java:207)
... 34 more
Caused by: siena.SienaException: java.lang.IllegalArgumentException: Can not set java.lang.String field models.Post.content to com.google.cloud.sql.jdbc.internal.ClientSideClob
at siena.Util.setField(Util.java:286)
at siena.jdbc.JdbcMappingUtils.setFromObject(JdbcMappingUtils.java:205)
at siena.jdbc.JdbcMappingUtils.mapField(JdbcMappingUtils.java:186)
at siena.jdbc.JdbcMappingUtils.mapObject(JdbcMappingUtils.java:79)
at siena.jdbc.JdbcMappingUtils.mapObject(JdbcMappingUtils.java:67)
at siena.jdbc.JdbcMappingUtils.mapList(JdbcMappingUtils.java:92)
at siena.jdbc.JdbcPersistenceManager.doFetch(JdbcPersistenceManager.java:636)
at siena.jdbc.JdbcPersistenceManager.fetch(JdbcPersistenceManager.java:728)
at siena.AbstractPersistenceManager.get(AbstractPersistenceManager.java:71)
at siena.BaseQuery.get(BaseQuery.java:111)
at play.modules.siena.SienaModelUtils.edit(SienaModelUtils.java:227)
... 42 more
Caused by: java.lang.IllegalArgumentException: Can not set java.lang.String field models.Post.content to com.google.cloud.sql.jdbc.internal.ClientSideClob
at siena.Util.setField(Util.java:284)
... 52 more
本质上，尝试将内容字段从 String 映射到 Google ClientSideClob 类是令人窒息的。有人有什么想法吗？