I was reading the following answer on Meta: https://german.meta.stackexchange.com/a/615/2906
And noticed the following sentence:
Diese Frage ist meiner Meinung nach ein Duplikat von dieser.
This seemed weird to me because I thought nach required the following article to be in the dative case, however the user did not use the dative case. Was this a mistake on his/her part or does the dative requirement go away with the "meiner Meinung nach" construct?