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I have attached a screenshot of the schema. I have order, order_lines and shipment_lines related as in the following picture... enter image description here

Is it mandatory to create a junction object to get shipment lines for a particular order line?

Thanks in advance!

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  • I'm having trouble understanding why Shipment lines is related to Order if the Shipment is related to the order (grandparent). A Shipment line item would seem to be a junction between Shipment and Order Line Item. – greenstork Sep 8 '14 at 17:30
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You can use the existing objects and relationships e.g. like this:

select Id, ...
from ShipmentLine__c
where Shipment__c in (select Shipment__c from OrderLines__c where Id = :orderLineId)
order by ...

so in general no you do not need to introduce another relationship/junction object.

Here is a good article on the subject of A Deeper look at SOQL and Relationship Queries on Force.com.

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  • This looks gr8! I wanted to have a field in ShipmentLines__c to display corresponding OrderLines__c. T think I will have to write a trigger to retrieve that field. Am I going the right direction? – MnZ Sep 8 '14 at 19:50
  • @MnZ Yeah if you are trying to have a direct link from a S hipmentLines__c to an OrderLines__c you'll need to put the logic in several triggers. – Keith C Sep 9 '14 at 8:03

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