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Trigger Error in Trailhead
While creating trigger in Trailhead.,got this error: Challenge Not yet complete... here's what's wrong:
The trigger logic failed to prevent double booking of a speaker. Please double check the 'RejectDoubleBooking' trigger code.
Here is code:
trigger RejectDoubleBooking on Session_Speaker__c (before insert, before update) {
//collect ID's to reduce data calls
List<Id> speakerIds = new List<Id>();
Map<Id,DateTime> requested_bookings = new Map<Id,DateTime>();
//get all speakers related to the trigger
//set booking map with ids to fill later
for(Session_Speaker__c newItem : trigger.new) {
requested_bookings.put(newItem.Session__c,null);
speakerIds.add(newItem.Speaker__c);
}
//fill out the start date/time for the related sessions
List<Session__c> related_sessions = [SELECT ID, Session_Date__c from Session__c WHERE ID IN :requested_bookings.keySet()];
for(Session__c related_session : related_sessions) {
requested_bookings.put(related_session.Id,related_session.Session_Date__c);
}
//get related speaker sessions to check against
List<Session_Speaker__c> related_speakers = [SELECT ID, Speaker__c, Session__c, Session__r.Session_Date__c from Session_Speaker__c WHERE Speaker__c IN :speakerIds];
//check one list against the other
for(Session_Speaker__c requested_session_speaker : trigger.new) {
DateTime booking_time = requested_bookings.get(requested_session_speaker.Session__c);
for(Session_Speaker__c related_speaker : related_speakers) {
if(related_speaker.Speaker__c == requested_session_speaker.Speaker__c &&
related_speaker.Session__r.Session_Date__c == booking_time) {
requested_session_speaker.addError('The speaker is already booked at that time');
}
}
}
}
Thanks,
The trigger logic failed to prevent double booking of a speaker. Please double check the 'RejectDoubleBooking' trigger code.
Here is code:
trigger RejectDoubleBooking on Session_Speaker__c (before insert, before update) {
//collect ID's to reduce data calls
List<Id> speakerIds = new List<Id>();
Map<Id,DateTime> requested_bookings = new Map<Id,DateTime>();
//get all speakers related to the trigger
//set booking map with ids to fill later
for(Session_Speaker__c newItem : trigger.new) {
requested_bookings.put(newItem.Session__c,null);
speakerIds.add(newItem.Speaker__c);
}
//fill out the start date/time for the related sessions
List<Session__c> related_sessions = [SELECT ID, Session_Date__c from Session__c WHERE ID IN :requested_bookings.keySet()];
for(Session__c related_session : related_sessions) {
requested_bookings.put(related_session.Id,related_session.Session_Date__c);
}
//get related speaker sessions to check against
List<Session_Speaker__c> related_speakers = [SELECT ID, Speaker__c, Session__c, Session__r.Session_Date__c from Session_Speaker__c WHERE Speaker__c IN :speakerIds];
//check one list against the other
for(Session_Speaker__c requested_session_speaker : trigger.new) {
DateTime booking_time = requested_bookings.get(requested_session_speaker.Session__c);
for(Session_Speaker__c related_speaker : related_speakers) {
if(related_speaker.Speaker__c == requested_session_speaker.Speaker__c &&
related_speaker.Session__r.Session_Date__c == booking_time) {
requested_session_speaker.addError('The speaker is already booked at that time');
}
}
}
}
Thanks,
1) https://developer.salesforce.com/forums/?id=906F0000000BV53IAG
2) https://developer.salesforce.com/forums/?id=906F0000000BT4wIAG
Let us know if this will help you