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Pass field name as a variable in getinstance
I have code that looks up a value in a custom field in a Custom Setting, kind of like below:
My_Custom_Setting__c.getInstance(a.Name).Custom_Field__c
Depending on some variable, "Custom_Field__c" could be one of 2 fields. I tried setting a string to the proper field name and then using that string in my get instance statement, kind of like below:
string custom_field;
if (something) {
string = 'Custom_Field_1__c';
}
else string = 'Custom_Field_2__c';
My_Custom_Setting__c.getInstance(a.Name).custom_field;
Of course, it looks for the field "custom_field" rather than replacing "custom_field" with "Custom_Field_1__c" or "Custom_Field_2__c". How do I get it to do what I want?
I tried both of the above but didn't get the results I wanted. Then I realized that I really only had 3 different statements using 2 different field values so I set a string to the entire statement before running through the code. Worked like a charm.
Basically, it looked like:
String SettingLookup; If (factor X){ String SettingLookup = 'MyCustom_Setting__c.getinstance(a.name).Factor_X_Field__c'; } else { SettingLookup = 'MyCustom_Setting__c.getinstance(a.name).Factor_Y_Field__c'; }and then I just called SettingLookup later.
All Answers
I guess you have to use the get method of Sobject.
Something like this
To explain more let us assume you have a Sobject and you want to access the value of Name field, so the code will be
Account acc = [SELECT Name FROM Account LIMIT 1]; String name = acc.get('Name');Try this :
My_Custom_Setting__c.getInstance('a.name ').Custom_Field__c;
replace a.name with a.name value in single quotes
I tried both of the above but didn't get the results I wanted. Then I realized that I really only had 3 different statements using 2 different field values so I set a string to the entire statement before running through the code. Worked like a charm.
Basically, it looked like:
String SettingLookup; If (factor X){ String SettingLookup = 'MyCustom_Setting__c.getinstance(a.name).Factor_X_Field__c'; } else { SettingLookup = 'MyCustom_Setting__c.getinstance(a.name).Factor_Y_Field__c'; }and then I just called SettingLookup later.