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Correctly parenthesize and put ON clauses.

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This commit is contained in:
Felipe Lessa 2012-09-05 16:47:33 -03:00
parent 8973d650a4
commit c0f5993be7
1 changed files with 8 additions and 7 deletions
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15
src/Database/Esqueleto/Internal/Sql.hs
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@ -303,15 +303,16 @@ makeFrom esc fs = ret
where
ret = case collectOnClauses fs of
Left expr -> throw $ mkExc expr
Right fs' -> first ("\nFROM " <>) $ uncommas' (map mk fs')
Right fs' -> first ("\nFROM " <>) $ uncommas' (map (mk False mempty) fs')
mk (FromStart (I i) def) = base i def
mk (FromJoin lhs kind rhs monClause) =
mconcat [ mk lhs
mk _ onClause (FromStart (I i) def) = base i def <> onClause
mk paren onClause (FromJoin lhs kind rhs monClause) =
(if paren then first parens else id) $
mconcat [ mk True onClause lhs
, (fromKind kind, mempty)
, mk rhs
, maybe mempty makeOnClause monClause ]
mk (OnClause _) = error "Esqueleto/Sql/makeFrom: never here (is collectOnClauses working?)"
, mk False (maybe mempty makeOnClause monClause) rhs
]
mk _ _ (OnClause _) = error "Esqueleto/Sql/makeFrom: never here (is collectOnClauses working?)"
base i def = (esc (entityDB def) <> (" AS " <> i), mempty)