how is object structure really created - when the child equipment is downloaded

1. create parent equip in ERP. 此时先不创建child equip
2. 用request download将parent equip download 到CRM:

这一步骤完成之后，ERP并不会生成任何IBASE，只会生成parent equip对应的object.

3. create child equip in ERP. 然后用request download replicate该child equip.

此时因为step2 parent equip download时并没有为parent 生成object structure, 因此该structure在child download时才被生成:

assign的原理就是为child equip创建一个类型为CRM_OBJECT(即object component) 的IBASE component:

call save function module保存:

成功找到整个download下来的hierarchy:

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