The triggers in Salesforce can be best understood while working with the scenarios for the creation of the simple triggers along with examples. Salesforce admin status and Developers have started using the triggers which helps in invoking the apex. The apex triggers help us informing the customized actions after or before the launch of the modifications inside the Salesforce records.
What is a trigger in Salesforce?
We can define a trigger using the trigger. Salesforce by stating that it is the Apex Code that helps in the execution of itself after or before the occurrence of the following operations. Trigger scenarios in Salesforce deals with certain situations that are directly related to the operations such as merge, update, delete, undelete and insert. The trigger. Salesforce is the particular website that helps in the execution of the task associated with the trigger action.
People often relate the Salesforce org with the working of Trigger actions because of the trigger in the Apex Code with the usage of a trigger. Salesforce is responsible for running before the occurrence of any of the operations listed above inside the object record. The trigger scenarios in Salesforce reveals that one can easily delete or insert the record inside the database even after the records are already deleted or there is any type of restoration activity from the recycle bin.
We can define the triggers for the standardized objects that stand at the top level for support in the triggers such as the account or in the form of the contract for maintaining the standard child objects namely custom objects. We can also state analyzing the trigger scenarios in Salesforce by the usage of object management settings concerned with the particular objects of whose accessibility e you required concerning the triggers.
Kinds of triggers in Salesforce
There are two types of triggers provided within the Salesforce org. The first one is the before triggers that help update on validating the record values before they are stored or saved inside the database. After update trigger in Salesforce is another type of the triggers that are responsible for accessing the field values already set up by the system including the idea of the records.
The after triggers are also helpful in affecting the modifications that occur inside the records such as while carrying out the process of logging inside the audit table or when we fire the asynchronous events within the queue. One thing we need to keep in mind that the mode of the triggers which are considered after triggers being fired by the records are saved in the read-only mode.
Modification by the triggers
Another factor associated with the modification of triggers illustrates that the triggers can easily change the records which carry the same data type provided within the relevant database that fired the trigger. The triggers can also modify the records by updating one of the particular contacts when they get fired. If there are more than one contact present within the database the triggers are also responsible for modifying one but all the contacts in the same manner.
This work can easily be performed by the triggers because triggers are responsible for managing and changing the other records. After all, the modifications that are occurring one by one can fire more triggers. The apex runtime engine also handles the work of considering all sorts of operations in the form of a single unit of work and also fixes the limitation on the operation number that needs to be performed for the prevention of infinite recursion activities.
If there is a need of updating or deleting the record insert a database before firing the trigger or there is a need to delete the record after the process of firing the trigger, there is another process associated with such activities that we will be receiving the runtime error in case of such execution procedures. The runtime error occurs and includes the two types of operations namely direct and indirect operations.
In case of handling the event such as updating the account A, and the before update Trigger of the same account gets inserted in another account known as account B, along with that we can see the after insert Trigger of the account be queries associated with the account
A and there is a process of updating the same with the help of DML update statement or any type of method such as database method, grand that case we will be indirectly handling the process of updating the account a provided within the before Trigger and hence we would receive the runtime error.
The trigger scenarios
1. The trigger scenario number 1
When we address the relevant scenarios associated with the firing of Trigger we can quote the example of updating the field named as hello with the help of the value world in the case where the requirement of the creation of an account or when we need to update the account record. We can create the field named hello in the name of the account object and can associate buy the value world within the class.
2. The trigger scenario number 2
In this scenario, we can understand the description of the trigger when there is a need to insert the lead inside a database. We can finally address that we can add doctor prefixed for all the lead names been provided and they are applicable in the case of updating or inserting the lead records.
3.Trigger scenario number 3
We can also address the scenario of the creation of the object named as books while creating the field price with the data type currency inside the associated objects. We can address that whenever there is a need to enter some amount of money e inside the price field and as soon as we click the button called the save button, we can observe the changes while entering the values in the price fields as 15 % or less than the actual price being decided by the market people.
4. The trigger scenario number 4
This scenario can be best understood by supervising the creation of the object called Customer Project while creating the status field inside the object provided in Association with the picklist data type. One thing we need to keep in mind that while creating the relationship between the opportunity and the customer objects we need to use the related list with the name Customer Project to get embedded inside the opportunity. The active Customer Project field when gets embedded with the opportunity object should be created while dealing with such a scenario of the trigger.
We can also address the logic that gets executed whenever there is a creation of the customer project in Association with the opportunity with the status turned as active. Finally, we can address the checkbox for the active customer support on the opportunity detail which gets checked on its own.
Implementation of the considerations associated with records in Salesforce
Before the creation of triggers, we need to consider some of the important points listed below. The upsert triggers are fired while handling the before and after insert or even handling the after and before update Trigger accordingly.
The merged triggers fire both after delete and before delete for the maintenance of the losing records. Also, both after and before update records are provided for the winning records. The triggers are also helpful in executing some of the activities after the record that has been undeleted only work associated with the specific objects.
The field history is not stored inside the trigger until the trigger gets ended and all the procedures are executed properly. Another factor kept in mind is that if the query field history is enforced inside the trigger, we will not be able to observe any type of history associated with the current transaction.
The field history tracking is responsible for honoring the permissions associated with the current user and in case the current user is not able to access the permission for directly editing the object or any type of field values, and another activity of activating the user with the help of Trigger gets launched that modifies the object on the field values while enabling the history tracking, that in that case there is no history modification being recorded.
The call-out is embedded according to the asynchronous events from the trigger for checking that the trigger process gets not blocked. We need to keep in mind that all these activities are executed when you wait for the response of the external services.
The process of calling out the asynchronous event can be executed within the background process while receiving the response at the time of returning the external events. There is also the process of managing the asynchronous call out with the help of asynchronous Apex methods such as future methods.
So far, we have analyzed the working of Salesforce Apex trigger in different circumstances along with the classification that helps update and validate the record values whenever required.