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Dynamics 365 Community / Forums / Microsoft Dynamics CRM (Archived) / associate one to many ...
Microsoft Dynamics CRM (Archived)

associate one to many relationship through code

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Posted on by sdnd2000 2,510

Hi, I am trying to associate one to many relationship through code, it seems that it is different from many to many association, since I just need add existing id to the relationship entity for many to many association. For one to many, do I have to create the record first? since every record has lookup values, not sure associate this. please help.

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  • Verified answer
    ashlega Profile Picture
    ashlega 34,477 on at

    Hi,

     you can simply set the lookup attribute on the child entity

     childRecord["lookupattribute"] = new EntityReference(parentEntityName, parentId);

     ...

     Update(childRecord);

  • Suggested answer
    Aric Levin - MVP Profile Picture
    Aric Levin - MVP 30,190 Moderator on at

    Hi,

    A one to many relationship is basically a lookup. You have to set the value of the lookup. This can be done from either JavaScript or plugin code. The target record in both cases must exist.

    In JavaScript (one of the ways), you can call the following function, and pass the parameters as required:

    // fieldname: the attribute that you want to set

    // lookupid: the unique identifier of the relationship

    // lookupname: the text of the identifier

    // entityname: the logical name of the entity

    function setLookupField(fieldName, lookupId, lookupName, entityName) {

       var lookupData = new Array();

       var lookupItem = new Object();

       lookupItem.id = lookupId;

       lookupItem.name = lookupName;

       lookupItem.entityType = entityName;

       lookupData[0] = lookupItem;

       Xrm.Page.getAttribute(fieldName).setValue(lookupData);

    }

    In C#/Plugin code

    entity[lookupFieldName] = new EntityReference(id_of_lookup, targetEntityName);

    Hope this helps.

  • sdnd2000 Profile Picture
    sdnd2000 2,510 on at

    sorry, I am bit confused, here is my scenario, I have incident and contact 1: n relationship. how can I set the contact in a new case, I have to use c# plugin code.

  • Verified answer
    ashlega Profile Picture
    ashlega 34,477 on at

    case["contactattribute"] = new EntityReference("contact", contactid);

    And you can only do it once they click "save" (since it's a plugin)

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