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Blog module group by issue 1055 error

edited August 22 in Modules

Some Fuel sites I have migrated to a new server, and on at least 2 occasions (so far) the Blog module has hit errors regarding MySQL 1055 error (where MySQL is v5.7.23).

In the Blog users and posts models' common queries, there is only 1 column in the GROUP BY, but this is denied by the MySQL settings.

I fixed the errors using:

posts model _common_query()
$this->db->group_by([$this->_tables['blog_posts'].'.id', $this->_tables['blog_users'].'.display_name' ]);

and in users model _common_query():
$this->db->group_by([$this->_tables['fuel_users'].'.id', $this->_tables['blog_users'].'.id']);


  • Can you run $this->debug_query() after it executes the query to output the raw SQL statement?

  • Actually... that won't work if it's erring before that.

  • It looks like it has something to do with the MySQL setting of "STRICT_TRANS_TABLES" (new one for me). I've pushed that fix to the blog module.

  • edited August 23

    I was getting this specifically:
    Error Code: 1055. Expression #26 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'display_name' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by

    The expression number varied in each model instance .

    It was new to me too - a new Cpanel / MySQL configuration default!?

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