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Can a list of sobjects be upserted in apex?
Apex automatically generates IDs for each object in an sObject list that was inserted or upserted using DML. Therefore, a list that contains more than one instance of an sObject cannot be inserted or upserted even if it has a null ID.
How to pass sobject list to apex from lightning?
Convert your list attribute into JSON string in lightning code (JSON.stringify ()) and pass it to apex method as method parameter (String). In apex method deserialize the JSON string into required List. This is working fine for me. In the same way I am passing List of object from component to apex methods.
How to auto populate a list in apex?
List myList = new List (); Auto-populating a List from a SOQL Query You can assign a List variable directly to the results of a SOQL query. The SOQL query returns a new list populated with the records returned.
When to use the apex attribute in Java?
If not specified, this value defaults to false. The Apex data type of the attribute. If using the assignTo attribute to assign the value of this attribute to a controller class variable, the value for type must match the data type of the class variable. Only the following data types are allowed as values for the type attribute:
How do you declare a list in apex?
To declare a list, use the List keyword followed by the primitive data, sObject, nested list, map, or set type within <> characters. For example: To access elements in a list, use the List methods provided by Apex.
How to bulk process a list of sobjects?
You can bulk-process a list of sObjects by passing a list to the DML operation. This example shows how you can insert a list of accounts. If you perform a bulk insert of Knowledge article versions, make the ownerId of all records the same.
What can you do with list of sobjects?
Lists of sObjects can be used for bulk processing of data. You can use a list to store sObjects. Lists are useful when working with SOQL queries. SOQL queries return sObject data and this data can be stored in a list of sObjects.