def save_model(self, request, obj, form, change):
        technology_tags_list = form.cleaned_data['technology_tags']
        concept_tags_list = form.cleaned_data['concept_tags']
        merged_tags = technology_tags_list + concept_tags_list
        if merged_tags:
            form.cleaned_data['tags'] = merged_tags

        super(ArticleAdmin, self).save_model(request, obj, form, change)
Mirror split tagfield contents in primary `tags` model.
dataset/ETHPy150Open mozilla/source/source/articles/admin.py/ArticleAdmin.save_model