I'm wondering if someone might be able to offer me a solution to the
following problem that has so far stumped me.
I'm trying to get the distinct months (and years) from a date field to
display as a list in a view. For example, there might be a number of
records stored with dates in the table 'headlines':
From which I'd like to get all distinct years and months to display in
a view something like what might be seen under the 'Archives' section
of a blog page, like this:
I have tried to set the following sql statement in my controller to
find the months using find_by_sql:
@headlines_month = Headline.find_by_sql("SELECT distinct
MONTHNAME(date) FROM headlines")
However, this errors out as:
PGError: ERROR: function monthname(date) does not exist at character
HINT: No function matches the given name and argument types. You may
need to add explicit type casts.
: SELECT distinct MONTHNAME(date) FROM headlines
It's monthname() which is what's causing it to error out as, if i
remove monthname() there are no problems.
I'm not sure if this is a problem of my limited understanding of that
rails command or an error with my sql statement but I'm out of ideas
so if anyone might have an idea for an effective solution - or can
point me in the right direction - I'd very much appreciate it.
Thanks in advance.