如何解决 olingo odata V2 $filter 错误？
[英]How can I solve olingo odata V2 $filter error?
问题描述
I have an olingo OData V2 service, which is working almost perfect.
我有一个 olingo OData V2 服务，它几乎完美运行。 CRUD methods are tested from POSTMAN. CRUD 方法是从 POSTMAN 测试的。 It is running on Tomcat, the db is MySQL and the project is in Eclipse.它在 Tomcat 上运行，数据库是 MySQL，项目在 Eclipse 中。
This is the service's code:这是服务的代码：
package main;
import org.apache.olingo.odata2.jpa.processor.ref.factory.JPAEntityManagerFactory;
import org.apache.olingo.odata2.processor.api.jpa.ODataJPAContext;
import org.apache.olingo.odata2.processor.api.jpa.ODataJPAServiceFactory;
import org.apache.olingo.odata2.processor.api.jpa.exception.ODataJPARuntimeException;
public class ODataServiceFromGenerator extends ODataJPAServiceFactory {
private static final String PERSISTENCE_UNIT_NAME = "cars";
@Override
public ODataJPAContext initializeODataJPAContext() {
ODataJPAContext oDataJPAContext;
try {
oDataJPAContext = getODataJPAContext();
oDataJPAContext.setEntityManagerFactory(JPAEntityManagerFactory
.getEntityManagerFactory(PERSISTENCE_UNIT_NAME));
oDataJPAContext.setPersistenceUnitName(PERSISTENCE_UNIT_NAME);
return oDataJPAContext;
} catch (ODataJPARuntimeException e) {
// TODO Auto-generated catch block
e.printStackTrace();
return null;
}
}
}
I can reach the metadata in this url: http://localhost:8080/GeneratorTry/cars.svc/$metadata我可以在这个 url 中访问元数据：http://localhost:8080/GeneratorTry/cars.svc/$metadata
When I try to filter one of my EntitySet ( http://localhost:8080/GeneratorTry/cars.svc/Vendors?$filter=startswith(Mobile,'+36') ) I get this error:当我尝试过滤我的 EntitySet 之一（ http://localhost:8080/GeneratorTry/cars.svc/Vendors?$filter=startswith(Mobile,'+36') ）时，我收到此错误：
HTTP Status 500 – Internal Server Error
java.lang.RuntimeException:
org.apache.cxf.interceptor.Fault:
java.lang.NoClassDefFoundError:
Apache Tomcat/9.0.35
The error message is the same with $orderby, but it is working with $select, $top, $skip, $count.错误信息与 $orderby 相同，但它适用于 $select、$top、$skip、$count。
Welcome any idea!欢迎任何想法！ Thank you for help in advance!提前感谢您的帮助！
1 个解决方案
解决方案1
0 2021-04-29 09:27:44
Have a look of this source: https://olingo.apache.org/doc/odata2/tutorials/Olingo_Tutorial_AdvancedRead_FilterVisitor.html看看这个来源： https : //olingo.apache.org/doc/odata2/tutorials/Olingo_Tutorial_AdvancedRead_FilterVisitor.html
You can use uriInfo.getFilter() to get the expression from the request.您可以使用 uriInfo.getFilter() 从请求中获取表达式。
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