在Liferay Service Builder中删除有关特定字段值的记录 [英] Delete record on sepecific field value in liferay service builder

问题描述

我想使用字段名称删除特定记录

I want to delete specific record using Field Name

表:虚拟实体

• 字段ID

• 字段名称

• Field Id

• Field Name

public void deleteLocation(req, res){
String getLocationName = request.getParameter("locationName");
Location locationToDelete = new LocationImpl();
locationToDelete.setLocationName(getLocationName);
LocationLocalServiceUtil.deleteLocation(locationToDelete);
}

它没有显示任何错误，但记录没有被删除.请帮我出来.

It's not showing me any error but the record doesn't get deleted. Please hep me out.

推荐答案

最简单的方法是为service.xml中的特定字段添加<finder>节点，如下所示(假设Location是您的实体名称) ，name是您的字段名称，Name是service.xml中的查找器条目的名称)和构建服务:

The simplest way to achieve this is to add <finder> node for that specific field in service.xml, as following (saying Location is your entity name, name is your field name and Name is the name of finder entry in service.xml) and build service:

<column name="name" type="String" />

<finder name="Name" return-type="Collection">
    <finder-column name="name" />
</finder>

成功构建后，它将基于该列在您的服务中创建CRUD操作.现在，您可以在LocationUtil.java中找到以下方法:

On successful build, it will create CRUD operations in your service based on that column. Now you can find following methods in your LocationUtil.java:

findByName,
removeByName,
countByName,

在LocationLocalServiceImpl.java中创建以下(新)方法:

Create following (new) method in LocationLocalServiceImpl.java:

public void deleteLocationsByName(String name){
    try{
        LocationUtil.removeByName(name);
    }catch(Exception ex){
        // log your exception
    }
}

同样，在构建服务时，该方法将在LocationLocalServiceUtil.java中的操作类中使用，您可以在其中将其称为:

Again, on building service, this method will be available for use in your action class from LocationLocalServiceUtil.java, where you can call it like:

public void deleteLocation(req, res){
    String locationName = request.getParameter("locationName");
    LocationLocalServiceUtil.deleteLocationsByName(locationName);
}

就是这样，您已经在服务中添加了自定义查找器方法.

That's it, you have added custom finder method to your service.

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