CurryInfo: ertools-3.0.0 / Database.ERD.Generic.existsEntryWithDBKey
definition: 
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existsEntryWithDBKey :: (Read t, Show t) =>
String -> (Key -> t -> Dynamic) -> Key -> Transaction ()
existsEntryWithDBKey ename entrypred key =
getDB (getDBInfo entrypred key) |>>=
maybe (errorT (TError KeyNotExistsError
("database contains no entry for key: "++show key
++" in table: "++ename)) )
(const doneT)
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demand:
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no demanded arguments |
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deterministic:
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deterministic operation |
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documentation:
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If there is no entry with a given key, raise a transaction error. |
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failfree:
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<FAILING> |
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indeterministic:
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referentially transparent operation |
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infix:
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no fixity defined |
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iotype:
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{(_,_,_,_,_) |-> _}
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name:
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existsEntryWithDBKey |
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precedence:
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no precedence defined |
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result-values:
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_ |
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signature:
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(Prelude.Read a, Prelude.Show a) => String -> (Prelude.Int -> a -> Database.KeyDatabaseSQLite.Dynamic) -> Prelude.Int -> Database.KeyDatabaseSQLite.Transaction () |
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solution-complete:
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operation might suspend on free variables |
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terminating:
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possibly non-terminating |
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totally-defined:
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possibly non-reducible on same data term |