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    <p>i'm not sure you can.</p> <p>But </p> <pre><code>Model.where(:id =&gt; 1) </code></pre> <p>Should generate a prepared statement. Fragment string works differently, so you can generate exactly what you need, in custom cases.</p> <p>Edit :</p> <p>Try this, i'm not sure it works, i can' test for now, but it looks like what you need :</p> <pre><code> Client.where("created_at &gt;= :start_date AND created_at &lt;= :end_date", {:start_date =&gt; params[:start_date], :end_date =&gt; params[:end_date]}) </code></pre> <p>More here: <a href="http://guides.rubyonrails.org/active_record_querying.html#conditions" rel="nofollow">http://guides.rubyonrails.org/active_record_querying.html#conditions</a></p> <p>In the placeholder section. Moreover date range works in the array format :</p> <p>:date => date_begenning..date_end</p> <p>Edit 2 : indeed you can, but i seems where don't support building this by hand.</p> <p>You might build your prepared queries by hand :</p> <p><a href="http://api.rubyonrails.org/classes/ActiveRecord/ConnectionAdapters/DatabaseStatements.html#method-i-exec_query" rel="nofollow">http://api.rubyonrails.org/classes/ActiveRecord/ConnectionAdapters/DatabaseStatements.html#method-i-exec_query</a></p> <pre><code>exec_query(sql, name = 'SQL', binds = []) </code></pre> <p>There is also a bind method on your relation.</p> <p>But both binds need that the value have a name method, they will crash if you give a fixnum, a hash, ect. I hadn't found any doc explaining how this works.</p> <p>Bu for the where clause, as long it is of Class String, active ecord apply a .to_sql on it, so you don't get your prepared statement.</p>
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    1. PORails 3.2 force prepared statements
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    1. COthis was a simplified example, it real query i can't use hash. and i really need to run it as prepared query
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    2. COCan you post the part of your query where you are struggling ?
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    3. COthere is a complex where with ORs ANDs and special operators like "period" && ?::daterange
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