I am trying to create a trigger that will populate a custom lookup field (Opportunity1_c) to Opportunities on Opp Team  with the value of the Opp that the Team Member is being added onto.

The reason being that I want to run workflows etc off the vlaues from the parent Opp but it cant be got to by standard methods - can this be done with a trigger?

 I have started to try and code one but my skills are not the best. Any help would be appreciated 

Here is what I have come up with so far 

trigger Opp_Team on OpportunityTeamMember (before insert, before update) {

Map <String, Opportunity > OppMap = new Map <String, Opportunity>();
for (Opportunity p : [SELECT Id, Name from Opportunity])
{
OppMap.put(p.Name,p);
}

for (OpportunityTeamMember a: Trigger.new)
{
a.Opportunity1__c = OppMap.get(Opportunity);
}


}

I am trying to create a trigger that will populate a custom lookup field (Opportunity1_c) to Opportunities on Opp Team  with the value of the Opp that the Team Member is being added onto.

The reason being that I want to run workflows etc off the vlaues from the parent Opp but it cant be got to by standard methods - can this be done with a trigger?

 I have started to try and code one but my skills are not the best. Any help would be appreciated 

Here is what I have come up with so far 

trigger Opp_Team on OpportunityTeamMember (before insert, before update) {

Map <String, Opportunity > OppMap = new Map <String, Opportunity>();
for (Opportunity p : [SELECT Id, Name from Opportunity])
{
OppMap.put(p.Name,p);
}

for (OpportunityTeamMember a: Trigger.new)
{
a.Opportunity1__c = OppMap.get(Opportunity);
}


}