Thank you for your response. 
My config is:

configure :production do
  DataMapper.setup(:default, {
    :adapter  => 'postgres',
    :encoding => 'UTF8',
    :host     => 127.0.0.1',
    :username => 'user' ,
    :password => 'god',
    :database => 'prod_db})  
end


And I try to  set all spellings of UTF8 including Unicode(from postgres 
documentation)
And one more: In production I have FreeBSD (7)  and as default locale 
installed C (ANSI encoding).

четверг, 6 сентября 2012 г., 17:21:01 UTC+4 пользователь Abe Voelker 
написал:
>
> Do you have an encoding set in config/database.yml?  Try setting it to 
> UTF-8 or utf8 (I don't remember which is correct), e.g.
>
> development:
>   adapter: postgresql
>   encoding: UTF-8
>
> development:
>   adapter: postgresql
>   encoding: utf8
>
> Also you might want to use the same database in development that you use 
> for staging/production.  It will save you a lot of headache.
>
> On Thu, Sep 6, 2012 at 7:27 AM, Leonid Batizhevsky 
> <[email protected]<javascript:>
> > wrote:
>
>> Hello ereryone.
>>
>> In my sinatra application I use datamapper with postgres and sqlite 
>> adapters.
>>
>> I use sqlite in development and every works fine.
>>
>> But then I deploy application and try to use with postgres I\ve got 
>> strange errors, like:
>>
>> Encoding Unicode is not a known Ruby encoding for PostgreSQL
>>
>>
>> and
>>
>> incompatible character encodings: ASCII-8BIT and UTF-8 
>> (Encoding::Compatibili tyError)
>>
>>
>> Please help me.
>> Thank you
>>
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>
>

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