Moving an element actually copies it about vddl HOT 8 OPEN

Try setting the index to the id of the item instead of a vue-generated index number.

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Starting from what @awulkan wrote, I set :key="item.id" and :index="itemVueGeneratedIndex"
This works (as there is no duplication or strange behavior anymore) but now I got the console warning:
Duplicate keys detected: '5'. This may cause an update error. which seems to be a known issue ( #23 and #27)

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Sorry for not responding, I had A break in the project, I got back to it and I will test the proposed solution on Sunday or Monday. Thanks for the support.

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Yes, the console warning is a known error. The app should still work as normal though. :)
I'm sure the error bug will be sorted out eventually.

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Possible duplication of #4 ?

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It seems that adding a new property "orderIndex" and making it a index for dragging does not make it working. It still copies but not duplicates that much.

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As @awulkan already said. Do not take the vue generated index. Instead set the key to :key="child.id" in here 'v-for="(child, num) in category.children" :category="child" :index="num" :list="category.children" '.

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works like a charm

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