From: "Md. Ruhul Amin" <amin@...>
Date: 2007-04-19T18:36:51+09:00
Subject: [ruby-dev:30720] can not convert array to string: problem of a newbie

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hi guys,

def fil_string
sql = ActiveRecord::Base.connection()
        filter_string=' '
        sql.begin_db_transaction
  column_ids = sql.execute("SELECT columnid FROM output_columns")
     column_ids.each do |column_id|
         filter_string=filter_string +" columnid='"+column_id+"'"
    end
     sql.commit_db_transaction
end

 but in the solution
Error: can not convert array to string
at line  -- filter_string=filter_string +" columnid='"+column_id+"'"  " 
--

Please take a hand in my code.

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charset=3Diso-2022-jp">
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<DIV><FONT face=3D"MS UI Gothic">hi guys,</FONT></DIV>
<DIV><FONT face=3D"MS UI Gothic"></FONT>&nbsp;</DIV>
<DIV><FONT face=3D"MS UI Gothic">def fil_string<BR>sql =3D=20
ActiveRecord::Base.connection()<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&n=
bsp;=20
filter_string=3D' '<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=20
sql.begin_db_transaction<BR>&nbsp; column_ids =3D sql.execute("SELECT =
columnid=20
FROM output_columns")<BR>&nbsp;&nbsp;&nbsp;&nbsp; column_ids.each do=20
|column_id|<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=20
filter_string=3Dfilter_string +" =
columnid=3D'"+column_id+"'"<BR>&nbsp;&nbsp;&nbsp;=20
end<BR>&nbsp;&nbsp;&nbsp;&nbsp; sql.commit_db_transaction<BR>end<BR><BR> =
but in=20
the solution<BR>Error: can not convert array to string<BR>at line&nbsp; =
--=20
filter_string=3Dfilter_string +" columnid=3D'"+column_id+"'"&nbsp; "=20
<BR>--<BR><BR>Please take a hand in my code.<BR></DIV></FONT>
<DIV><FONT face=3D"MS UI Gothic"=20
size=3D2>-----------------------------------<BR>=1B$B3t<02q<R=1B(B SAO =
=1B$B!J%(%9=1B(B =1B$B%(!<=1B(B =1B$B%*!<!K=1B(B<BR>=1B$B%i%U%k=1B(B=20
=1B$B%"%_%s=1B(B<BR>-----------------------------------</FONT></DIV></BOD=
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