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POHaskell Snap: mongodb field type error
 

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  1. POHaskell Snap: mongodb field type error
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    <p>I get an error which I can't resolve. The snap application compiles without a problem and everything seems to be ok. But when I render the relevant page in a browser I get this error:</p> <p>A web handler threw an exception. Details: expected ("code" :: Integer) in [ _id: 50b56f19208c2e9a09dccc2b, id: 1.0, code: "hdg435", name: "froggy"]</p> <p>The code value is just a rendom string I picked for testing. I am not sure why an integer is expected?</p> <p>These are the relevant parts of an example snap application.</p> <pre><code>getData :: IO [Document] getData = do pipe &lt;- runIOE $ connect $ host "127.0.0.1" let run act = access pipe master "test" act result &lt;- run (find (select [] "pcs") &gt;&gt;= rest) close pipe return $ either (const []) id result mkSplice :: Document -&gt; Splice AppHandler mkSplice d = runChildrenWithText [dtp "id" d ,dtp "code" d ,dtp "name" d ] dtp :: Text -&gt; Document -&gt; (Text,Text) dtp tag d = (tag, T.pack $ show $ at tag d) recSplice :: Splice AppHandler recSplice = mapSplices mkSplice =&lt;&lt; liftIO getData table :: Handler App App () table = heistLocal (bindSplice "rec" recSplice) $ render "table" </code></pre> <p>The relevant Heist template part of table.tpl is here:</p> <pre><code>&lt;table&gt; &lt;tbody&gt; &lt;rec&gt; &lt;tr&gt;&lt;td&gt;&lt;id/&gt;&lt;/td&gt;&lt;td&gt;&lt;code/&gt;&lt;/td&gt;&lt;td&gt;&lt;name/&gt;&lt;/td&gt;&lt;/tr&gt; &lt;/rec&gt; &lt;/tbody&gt; &lt;/table&gt; </code></pre> <p>Please let me know what other parts of code need to be posted.</p>
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    1. USr.sendecky
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      1. POHaskell Snap: mongodb field type error
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    1. COI don't see anything here that would coerce that field to Integer. The problem has to be somewhere else. Perhaps the code that is actually being executed is not what you expect? Perhaps you could try changing the code field to be an int and see what happens. Also, my memory is that mongo is mostly schemaless, but could there be anything in mongo that that is expecting an Integer?
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    2. CO@mightybyte, thanks. I thought I was doing something dumb. This is really weird and I can't understand why. I changed the record so it contains just strings without any numbers like this: [ _id: 50b6e74852a4923015a9f225, id: "a", code: "hfgarqe", name: "froggy"] Still, it complains about expected integer. I am poling my hair now. Processing the above record I get this error: A web handler threw an exception. Details: expected ("id" :: Integer) in [ _id: 50b6e74852a4923015a9f225, id: "a", code: "hfgarqe", name: "froggy"] Maybe I should explicitly cast mongo values to haskell values ...
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      1. USr.sendecky
 

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