List has no rows for assignment - salesforce

Question

Can any one help me in solving this error:List has no rows for assignment to SObject
Class at line :
        
qName = [select Row_Id__c, Name from Ccon__c where Id = :ApexPages.currentPage().getParameters().get('id')].Row_Id__c;
Test Class line :
Controller  controller1  = new Controller(sc1);

Answer 1

This mean your query is returning no result (So the list is empty and then when casting into an Sobject there is not item to take).
qName = [select Row_Id__c, Name from Ccon__c where Id = :ApexPages.currentPage().getParameters().get('id')].Row_Id__c;
I would do it this way (to make sure in any case I will get value from my query if my ID is valid):
Id tempID = null;
if(ApexPages.currentPage().getParameters().get('id') != null)
{
tempId = ApexPages.currentPage().getParameters().get('id');
}
else{ //Error management
}
List<Ccon__c> recordsToProcess = new List<Ccon__c>();
if(tempID != null)
{
recordsToProcess = [select Row_Id__c, Name from Ccon__c where Id = :tempID];
}
else{ //Error management
}
//qName Declaration
if(!recordsToProcess.isEmpty())
{
qName = recordsToProcess[0].Row_Id__c;
}
else{ //Error management
}
if(qName == null)
{
//Error management
}
If you have more questions please feel free to ask. But as a best practice you might always ensure that your list is not empty before getting the record returned.
Thanks
HqSeO