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definition:
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updateEntry :: EntityDescription a -> a -> DBAction ()
updateEntry ed ent = do
let table = getTable ed
columns <- getColumnNames table
let values = getToValues ed ent
SQLInt key = head values
keycol = head columns
colvals = zipWith (colValAlt table) (tail columns) (tail values)
column = Column ("\"" ++ keycol ++ "\"")
("\"" ++ table ++ "\".\"" ++ keycol ++ "\"")
const = col column .=. int key
updateEntries ed colvals const
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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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--- Updates an entry by ID. Works for Entities that have a primary key
--- as first value.
--- This operation updates the entry in the database with the ID
--- of the entry that is given as parameter with the values of
--- the entry given as parameter.
--- @param ed - The EntityDescription describung the entity-type
--- @param entry - The entry that will be updated
--- @return A Result without parameter if everything went right,
--- an Error if something went wrong
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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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updateEntry
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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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Database.CDBI.Description.EntityDescription a -> a
-> Database.CDBI.Connection.DBAction ()
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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
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