Trigger to update parent object value -- w3web.net

Trigger to update count of child records with custom field of parent object | count of child records on parent for lookup relationship uses of apex trigger in Salesforce

Hey guys, today in this post we are going to learn about how to update count of child records with custom field value into parent object using trigger map list in Salesforce.

Real time scenarios:- Write a trigger on parent object where create a custom field as Employee (Number type).

If user insert the parent record, the child record should be automatic inserted equal to the same value of employee.

Or if user update the value of employee less then the total number of child records, in this case the child records should be exist only equal to employee size, rest records of child object should be automatic removed.

parentObjTrigger:- Custom Fields & Relationships

Create a custom field on parent Object name as Employee__c (Number Type).

childObjTrigger:- Custom Fields & Relationships

Create a lookup relationship field on child Object name as childLookup__c :: Lookup(parentObjTrigger).

Files we used in this post example:-

EmployeeSizeTrigger.apxt Apex Class Trigger It will be fired whenever insert or update a record on parent object

Parent Cusotm Object:- parentObjTrigger__c

Custom Field:- EmployeeName__c

Parent Object with Custom Field Trigger on parent object and updae the count of related child records with the custom field value of parent object.

Child Custom Object:- childObjTrigger__c

Custom Field:- childLookup__c : Lookup(parentObjTrigger)

Child Object with Custom Field childLookup__c : Lookup(parentObjTrigger) field it is help to communicate on parent object.

Final Output

Trigger to update parent object value -- w3web.net

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Step 1:- Apex Class Trigger : EmployeeSizeTrigger.apxt

From Developer Console >> File >> New >> Apex Trigger

EmployeeSizeTrigger.apxt [Apex Class Trigger]

TechW3web:- Apex Trigger to Update Count of Child Records into Parent Object Custom Field in Salesforce

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Hi, This is Vijay behind the admin and founder of w3web.net. I am a senior software developer and working in MNC company from more than 8 years. I am great fan of technology, configuration, customization & development. Apart of this, I love to write about Blogging in spare time, Working on Mobile & Web application development, Salesforce lightning, Salesforce LWC and Salesforce Integration development in full time.

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