How to check if soql query returned null?
If you do the single row assignment approach ( userAccount = [Select Name from Account where id=:accountID];) then if the query returns anything other than 1 row, it’ll throw an exception. You should also check that accountID has a value before the soql.
When to use soql queries that return one record?
Using SOQL Queries That Return One Record SOQL queries can be used to assign a single sObject value when the result list contains only one element. When the L-value of an expression is a single sObject type, Apex automatically assigns the single sObject record in the query result list to the L-value.
When does apex assign a sobject to an L-value?
When the L-value of an expression is a single sObject type, Apex automatically assigns the single sObject record in the query result list to the L-value. A runtime exception results if zero sObjects or more than one sObject is found in the list.
When to run a runtime exception in apex?
A runtime exception results if zero sObjects or more than one sObject is found in the list. For example: // the query. Notice that the second line dereferences the field from the
How to filter empty strings ( not null ) in soql?
Filter Empty Strings (Not Null) in SOQL. Interesting behavior with SOQL query. Here is the setup. Some_Field__c is a Text length 20. and it returns the row. does not return a row. doesnt return anything. doesn’t return anything. How do I filter on the empty string? Try this…
Can a becoz query return a null value?
Becoz query does not have this type of data, therefore, doesnt return anything. 2-If you have empty value of this field and comparing to null empty string or null value with Id the query return nothing. query does not have this type of data therefore doesn’t return anything.
How to get product2 values in soql query?
Using the same query, you can get the values on Product2 by specifying the product family (which points to the field’s data): Any query (including subqueries) can include a WHERE clause, which applies to the object in the FROM clause of the current query.
How are soql queries embedded in Apex code?
When SOQL is embedded in Apex, it is referred to as inline SOQL. To include SOQL queries within your Apex code, wrap the SOQL statement within square brackets and assign the return value to an array of sObjects. For example, the following retrieves all account records with two fields, Name and Phone, and returns an array of Account sObjects.
When to use null check in Salesforce Stack Exchange?
So you’d just check for NULL if other code generated the list for you, say from an apex method you didn’t code. As @cropredy mentioned in his answer, if you do generate List or Map, don’t return NULL, return an empty one so that the for ( Account a : accounts )idiom works regardless.