Tag Archives: Hierarchical Select

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Drupal 7 – Reference field option limit for hierarchy taxonomy

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Update @ 2013-11-28: You can also consider using Taxonomy Term Reference Tree Widget suggested by kenorb. =D

When you have a hierarchy structure of taxonomy, the default selection list is not quite user friendly because it list out all the parent and child terms. Assume with want to attach a country and city terms to the Article content type. The most straight forward way is create one vocabulary with some countries as parent terms and some cities as child terms like the following list.
  — England
    — London
    — Manchester
  — France
    — Lyon
    — Paris

It turns on that when someone is adding a new article, he may select either a country term or a city term. That is probably not what we want.
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Drupal 7 – Mutiliple selection list for taxonomy using Hierarchical Select

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Taxonomy is a must have tool for grouping relevant content together. On the other hand, with the help of Views and exposed filter, user could easily list out the content with specific taxonomy.

But when a taxonomy has more than 1 levels, the filter option list may get too long and become less user friendly. In the past, i tried to make a multiple selection lists by applying some Javascript and jQuery on the exposed filter. It turns out that the result is quite bad.

Recently i found that there is a module which could turn the multiple levels taxonomy into multiple selection lists. It is called Hierarchical Select written by Wim Leers who is also the author of Drupal CDN module. Let’s try it now.
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