Message fields user_one and user_two concern me. Before I respond to your
question, would you mind sharing the structure of your message and user
tables?
Thanks, Liz
On Friday, July 31, 2015 at 1:53:08 AM UTC-4, nilayy...@gmail.com wrote:
>
> I have a very simple question how can I convert mysql query as Raisl
> active record I am using find_by_sql but it only work for mysql when I move
> to heroku it doesn't work . Here is mysql query below .
>
> @message3 = User.find_by_sql("SELECT u.id,c.m_id,u.name,u.email
> FROM messages c, users u
> WHERE CASE
> WHEN c.user_one = #{current_user.id}
> THEN c.user_two = u.id
> WHEN c.user_two = #{current_user.id}
> THEN c.user_one= u.id
> END
> AND (
> c.user_one ='1'
> OR c.user_two ='1'
> )
> Order by c.m_id DESC Limit 20")
>
> I have tried different rules to run it and no success . I have used this
> code below :
>
> @m1 =
> Message.joins(:user).select("users.id,messages.m_id,users.name,users.email
> ,CASE WHEN messages.user_one =#{current_user.id} THEN messages.user_two
> =users.id WHEN messages.user_one =users.id THEN messages.user_two =1
> END").where("messages.user_one = 1 OR messages.user_two = 1
> ").limit(20).order(:m_id)
>
> But above code is not generating the correct result here I have two models
> user and message their relation is user has_many messages and messages
> belons_to user When I am using this code I am getting this result in json
> format with no error .
>
> [{"m_id":55,"id":55,"name":"Example User","email":"ni...@jumpbook.in
> <javascript:>","CASE WHEN messages.user_one =1 THEN messages.user_two
> =users.id WHEN messages.user_one =users.id THEN messages.user_two =1 END":0}]
>
> How can I use this query perfectly and why I am getting this result when I
> am using select function in this query is there anyone help me
>
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