CreateMerchandiseData

public class CreateMerchandiseData {
    
    public static void ClearMerchandiseDataBatch() {
        String query = 'SELECT Id,CreatedDate FROM Merchandise__c ' +
			'WHERE Id NOT IN (SELECT Merchandise__c FROM Line_Item__c)';
			CleanUpRecords c = new CleanUpRecords(query);
			Database.executeBatch(c);
    }
    
    public static void GenerateMerchandiseData() {
		// Create Warehouse if one does not exist
		Warehouse__c w;
    
	    List<Warehouse__c> warehouse = [SELECT ID from Warehouse__c];
		if(warehouse.size() == 1 || warehouse.size() == 0) {
			w = new Warehouse__c(
			Name='Warehouse 1',
			City__c='San Francisco',
			Location__Latitude__s=37.7833,
			Location__Longitude__s=122.4167);
			insert w;
		} else {
			w = warehouse[0];
		}
        
		Merchandise__c[] ml = new List<Merchandise__c>();
		for (Integer i=0;i<250;i++) {
			Merchandise__c m = new Merchandise__c(
			Name='Merchandise ' + i,
			Price__c=2,
			Quantity__c=100,
			Warehouse__c = w.Id);
			ml.add(m);
		}
		insert ml;
	}
}