ruby on rails - PGError: ERROR: syntax error at or near E'String' -


i have ruby on rails condition works in mysql not in postgres

:conditions => ["a between ? , ? , b between ? , ? , c between ? , ? , ddd ?",@amin,@amax,@bmin,@bmax,@cmin,@cmax,params[:input].to_s]

generates error:

activerecord::statementinvalid (pgerror: error:  syntax error @ or near "e'word'" line 1: ...c between -100 , 100 , ddd e'word')

i know works without last comparison. eg.

    :conditions => ["a between ? , ? , b between ? , ? , c between ? , ?",@amin,@amax,@bmin,@bmax,@cmin,@cmax]

ddd of type :string whereas a,b , c :decimal.

after doing research on postgresql seems e' strings escaped strings - doesn't me can't seem correct it. don't work postgresql apologize in advance if obvious.

i'm using heroku hosting can't change postgresql settings. anyway, i'd prefer understand problem , how fix it.

cheers, stu

try changing 

ddd ?

into

ddd = ?

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