Determine `SObject type` from relationship name without an exhaustive search

apexdescribefieldresultdescribesobjectsobject

Consider a general relation 'Foo.Bar' and some SObject type. An example might be 'Account.Id' and an Opportunity.SObjectType.

Can I determine SObjectType Foo is referring to without getting the field map and checking each DescribeFieldResult to find the field where getRelationshipName() == 'Foo' and then extracting potential types from getReferenceTo()?

Best Answer

If you know the field you want to examine at compile-time, then you can get the describe information for that field directly.

Opportunity.AccountId.getDescribe().getReferenceTo()[0].getDescribe().getName()

If this is more dynamic, and you don't know which field to examine until run-time, then there's no way around needing to get the field map from the DescribeSObjectResult, though since you can get a Map<String, DescribeFieldResult> (the keys are API names) you can simply get the specific field you're looking for.

Opportunity.SObjectType.getDescribe().fields.getMap().get('AccountId').getDescribe().getReferenceTo()[0].getDescribe().getName())

If you have an instance of an SObject with the target relationship field populated, you can use that Id to get at the SObject type

myOpp.AccountId.getSObjectType().getDescribe().getName()

Related Solutions

[SalesForce] Determine sobject Type From Id Using SOAP API

best solution I've come up with so far is to use .describeGlobal() like this:

DescribeGlobalResult dgr = binding.describeGlobal();
DescribeGlobalSObjectResult dgsr = dgr.sobjects.FirstOrDefault(x =>
    string.IsNullOrEmpty(x.keyPrefix) ? false : id.StartsWith(x.keyPrefix));

    if (dgsr != null)
    {
        switch (dgsr.name)
        {
            case "custom1__c":
                ...
                break;
            case "custom2__c":
                ...
                break;
            case "custom3__c":
                ...
                break;
            default:
                ...
                break;
        }
    }

[SalesForce] How Do I Work With Field Type Describe Information in Lightning Components

You'll need to do this in javascript.

I'm a bit unsure when you want to do the component creation, I'm guessing at init, so in your c.init function, you'll have

var fieldName = cmp.get("v.fieldName");
$A.createComponent("ui:inputDate", { "value": cmp.getReference("v.case." + fieldName) }, function callback(newCmp) {  cmp.set("v.body", newCmp); });

You can see using cmp.getReference() is what creates the link you would normally get by using {!v.case.Reason} in the cmp file.

Best Answer

Related Solutions

[SalesForce] Determine sobject Type From Id Using SOAP API

[SalesForce] How Do I Work With Field Type Describe Information in Lightning Components

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