# Migrar um fórum NodeBB com MongoDB para Discourse **URL:** \ **Category:** Sysadmins\ **Tags:** how-to\ **Created:** [Agosto 22, 2019, 5:33pm UTC](https://meta.discourse.org/t/migrate-a-nodebb-forum-with-mongodb-to-discourse/126553 "2019-08-22T17:33:06Z")\ **Posts on this page:** 1\ **Showing post:** 2
**Author:** ![FreeWorLD](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/freeworld/32/156863_2.png) [@FreeWorLD](https://meta.discourse.org/u/FreeWorLD)\ **Post date:** [Setembro 21, 2019, 6:59am UTC](https://meta.discourse.org/t/migrate-a-nodebb-forum-with-mongodb-to-discourse/126553/2 "2019-09-21T06:59:36Z")
Muito bom trabalho! Enquanto eu tentava, recebi o erro abaixo. Alguma ideia do que eu possa estar fazendo de errado aqui? ```plaintext importing groups 10 / 10 (100.0%) [474765 items/min] importing top level categories... 8 / 8 (100.0%) [437896 items/min] importing child categories... 68 / 68 (100.0%) [774048 items/min] importing users 5534 / 5534 (100.0%) [355520 items/min] adding users to groups... importing topics... Traceback (most recent call last): 12: from script/import_scripts/nodebb/nodebb.rb:532:in `
' 11: from /home/fsuzer/discourse/script/import_scripts/base.rb:47:in `perform' 10: from script/import_scripts/nodebb/nodebb.rb:52:in `execute' 9: from script/import_scripts/nodebb/nodebb.rb:336:in `import_topics' 8: from /home/fsuzer/discourse/script/import_scripts/base.rb:877:in `batches' 7: from /home/fsuzer/discourse/script/import_scripts/base.rb:877:in `loop' 6: from /home/fsuzer/discourse/script/import_scripts/base.rb:878:in `block in batches' 5: from script/import_scripts/nodebb/nodebb.rb:337:in `block in import_topics' 4: from /home/fsuzer/discourse/script/import_scripts/nodebb/mongo.rb:71:in `topics' 3: from /home/fsuzer/discourse/script/import_scripts/nodebb/mongo.rb:71:in `map' 2: from /home/fsuzer/discourse/script/import_scripts/nodebb/mongo.rb:71:in `block in topics' 1: from /home/fsuzer/discourse/script/import_scripts/nodebb/mongo.rb:79:in `topic' /home/fsuzer/discourse/script/import_scripts/nodebb/mongo.rb:100:in `post': undefined method `[]' for nil:NilClass (NoMethodError) ``` --- _[View the full topic](https://meta.discourse.org/t/migrate-a-nodebb-forum-with-mongodb-to-discourse/126553)._