[SalesForce] Retrieving results from a map

I'm trying to work with and understand maps.
I have the following map and I don't know how to retrieve one of the results from it, can some one explain what I'm doing wrong?

Map<String, RecordType >RecTypeList = new map<String, RecordType>([select Name, id from RecordType
                         where sObjecttype = 'Service_call_Task__c' 
                         AND  DeveloperName IN ('Service','Alarm')]) ;
system.debug(RecTypeList);
system.debug(RecTypeList.get('Alarm'));

The first debug line returns the id of the recordtype and then the results of the SOQL Query

{0124E00000010OaQAI=RecordType:{Name=Service, Id=0124E00000010OaQAI}, 0124E00000010P9QAI=RecordType:{Name=Alarm, Id=0124E00000010P9QAI}}

I was expecting something like Alarm = 0124E00000010P9QAI

The second debug line returns a null result.

I've tried to change the map from

<String, RecordType> to <String, Id >

but i get an error:

Invalid initializer type List found for Map: expected a Map with the same key and value types, or a valid SObject List

Best Answer

Here is the approach:

Map<Id, RecordType> RecTypeMap = new map<Id, RecordType>([SELECT id, Name  from RecordType
                                                     where sObjecttype = 'Service_call_Task__c' 
                                                     AND  DeveloperName IN ('Service','Alarm')]) ;
for(Id recId:RecTypeMap.keySet())
{
    RecordType rdObject = RecTypeMap.get(recId);
    String recName = rdObject.Name;
}

Ideally, to retrieve the RecordType information you do not need to perform separate SOQL query. You can do that by using Schema class.

Schema.DescribeSObjectResult R = Service_call_Task__c.SObjectType.getDescribe();
List<Schema.RecordTypeInfo> lstRT = R.getRecordTypeInfos();
for(Schema.RecordTypeInfo rt:lstRT)
{
    System.debug('RecordTypeName=' + rt.getName());
    if(rt.getName().contains('Service') || rt.getName().contains('Alarm'))
    {
         System.debug('RecordTypeId=' + rt.getRecordTypeId());
    }
}

Related Solutions

[SalesForce] Salesforce creating field values as map keys and results as values

Have I understood your question correctly?

1: i need to add field name like 'id,name,fld3,fld4 etc,.. as map keys

String fieldNames = String.join(new List<String>{
    SObjectType.Opportunity.Fields.Id.Name, //"Id"
    SObjectType.Opportunity.Fields.Name.Name //"Name"
}, ',');

List<Opportunity> opportunities = Database.query('SELECT ' + fieldNames + ' FROM Opportunity');

2: and results of the fields as map values

You are looking for data structure like this?

{
    "Id": [
        "006d0000008WaWzAAK",
        "006d0000008WaWpAAK",
        "006d0000008WaXHAA0"
    ],
    "Name": [
        "Pyramid Emergency Generators",
        "Dickenson Mobile Generators",
        "Grand Hotels Emergency Generators"
    ]
}

You can use a Map<String,List<Object>> data structure to hold all the field values. Then convert the SObject into a Map itself to loop over its fields easily. Here's a code sample that yields the above:

//select any fields you want
List<Opportunity> opportunities = [SELECT Id, Name FROM Opportunity]; //or from above

//prepare the data structure to hold the list of values
Map<String,List<Object>> field2values = new Map<String,List<Object>>();

//every opportunity
for (Opportunity opportunity : opportunities) {
    //we can convert any SObject into a Map
    Map<String,Object> mapOpp = (Map<String,Object>)Json.deserializeUntyped(Json.serialize(opportunity));

    //every field
    for (String key : mapOpp.keySet()) {

        //leave out the metadata
        if (key == 'attributes') continue;

        //list of values needs to be initialized the first time around
        if (field2values.get(key) == null) field2values.put(key, new List<Object>());

        //populate each value
        field2values.get(key).add(oppMap.get(key));
    }

}

System.debug(Json.serializePretty(field2values));

[SalesForce] How to merge multiple Map/JSON Object into One Map

Something like this?

Map<String,Object> jsonMap = new Map<String,Object>{'root'=> new Map<String,Object>{'field1'=>'value','field2'=>'value'}};
System.debug(JSON.serialize(jsonMap));

Your parent map key is root, so if you wanna add field3, you can

((Map<String,Object>)jsonMap.get('root')).put('field3','value');

Best Answer

Related Solutions

[SalesForce] Salesforce creating field values as map keys and results as values

[SalesForce] How to merge multiple Map/JSON Object into One Map

Related Topic