Rails - How to select the last date in a table?

How do I select the last date in a table where the column name is Lars.

I have tried this:

<%= Reklamer.where(":dato => :dato, AND :name => :name", :date => Date.last, :name => "Lars")  %>

I have tried this:

<%= Reklamer.where(name: 'Lars').order('dato ASC').limit(1).select('dato').inspect %>

Output:[#<Reklamer dato: "2011-02开发者_运维百科-15 23:53:28">]

I need just a datetime format like: 2011-02-15 23:53:28

How do I do that?

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You have to order by the date and select a single record:

<%= Reklamer.where(name: 'Lars').order('dato DESC').first %>

You can accomplish this by limiting to a single record as well:

Reklamer.where(name: 'Lars').order('dato DESC').limit(1)

If you just want the last date from the last entry, you can do this:

Reklamer.where(name: 'Lars').last.dato