执行 SOQL 操作的动态查询不起作用

Question

我正在尝试使用少量参数进行动态 soql 查询，但无法正确执行

string knowledgeQuery = '';
string publishStatusOnline = 'Online';
// At the moment 'Knowledge__kav' only supports two languages 'is-is' and 'en-us'
if(language == 'is-is'){
    language = 'is';
    knowledgeQuery = 'SELECT Id, Customer_Facing_Instruction__c FROM Knowledge__kav WHERE UrlName = :name AND PublishStatus = :publishStatusOnline AND language = :language ORDER BY VersionNumber DESC LIMIT 1';
} else {
    knowledgeQuery = 'SELECT Id, Customer_Facing_Instruction__c FROM Knowledge__kav WHERE UrlName = :name AND PublishStatus = :publishStatusOnline ORDER BY VersionNumber DESC LIMIT 1';
}

System.debug(knowledgeQuery);
Knowledge__kav article = Database.query(knowledgeQuery);
        
return article;

Tke KnowledgeQuery 字符串看起来像这样SELECT Id, Customer_Facing_Instruction__c FROM Knowledge__kav WHERE UrlName = :name AND PublishStatus = :publishStatusOnline ORDER BY VersionNumber DESC LIMIT 1

Answer 1

检查代码后，因为真的没有什么动态的，我想知道是否需要动态查询。我想您可以通过以下方式实现基本相同的目标：

Knowledge__kav article;
String publishStatusOnline = 'Online';
// At the moment 'Knowledge__kav' only supports two languages 'is-is' and 'en-us'
if(language == 'is-is'){
    language = 'is';
    article = [SELECT Id, Customer_Facing_Instruction__c FROM Knowledge__kav WHERE UrlName = :name AND PublishStatus = :publishStatusOnline AND language = :language ORDER BY VersionNumber DESC LIMIT 1];
} else {
    article = [SELECT Id, Customer_Facing_Instruction__c FROM Knowledge__kav WHERE UrlName = :name AND PublishStatus = :publishStatusOnline ORDER BY VersionNumber DESC LIMIT 1];
}
        
return article;