automatic numbering of the trees

Hello everybody
In my survey there are plots with informations existing trees. On these plots new trees should be added. These should be numbered automatically. How can I generate a consecutive numbering that follows the highest number of existing trees? For example: Existing trees have the number 1-10 and the first new tree should automatically receive the number 11.

Thanks for your advice

collect

asked 28 Jan '20, 13:51

Sabrina
63●7●34
accept rate: 0%

8 Answers:

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0	Hi, You have to write expression in "Default Value" math:max(parent()/tree/tree_id)+1 where tree-is Entity tree_id - is Number attribute best regards beka permanent link answered 28 Jan '20, 16:03 beka 185●8●36 accept rate: 6%

0	when I try this I get the following error message: [RPC Fault faultString="Circular dependency found in graph for node /inventur/plot/pb[2]/baumnr_neu" permanent link answered 28 Jan '20, 16:07 Sabrina 63●7●34 accept rate: 0%

0	can you tall me names of tree "Entity" and "Number attribute" from you survey? permanent link answered 28 Jan '20, 18:58 beka 185●8●36 accept rate: 6%

0	the "Entity" is pb and the "Number attribut" is baumnummer_neu permanent link answered 29 Jan '20, 08:38 Sabrina 63●7●34 accept rate: 0%

0	under baumnummer_neu, try this expression in "Default Value" math:max(parent()/pb/baumnummer_neu)+1 permanent link answered 29 Jan '20, 11:05 beka 185●8●36 accept rate: 6%

0	Unfortunately, that doesn't work. In collect the tree number is not adjusted and in collect mobile it crashes when I add a new tree. permanent link answered 29 Jan '20, 11:16 Sabrina 63●7●34 accept rate: 0%

0	see also picture example from our survey permanent link answered 29 Jan '20, 11:18 beka 185●8●36 accept rate: 6%

0	I can't explain why it's not working. I do everything the way you do it. Maybe I can send you a screenshot? permanent link answered 29 Jan '20, 11:35 Sabrina 63●7●34 accept rate: 0%

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question asked: 28 Jan '20, 13:51

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last updated: 29 Jan '20, 11:35

automatic numbering of the trees

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