Alex Black a...@alexblack.ca writes:
Hi, I'd like to rewrite a url like this:
/manufacturer/product
e.g.
LiftRules.statelessRewrite.append( {
case RewriteRequest(
ParsePath( manufacturerName :: productName :: Nil, _, _,_), _,
_) =
RewriteResponse(productView :: Nil)
})
But, I'd like to the ParsePath case to not 'catch' for non-existant
manufacturers, and non-existant products by the manufacturer.
So, I might do this:
LiftRules.statelessRewrite.append( {
case RewriteRequest(
ParsePath( Manufacturer(manufacturer) :: Product(product) ::
Nil, _, _,_), _, _) =
RewriteResponse(productView :: Nil)
})
Where Manufacturer and Product objects provide an extractor which does
a lookup.
However, the product lookup depends on the manufacturer.. is there a
way to handle that?
ideas:
1. use an if guard
case RewriteRequest(
ParsePath( Manufacturer(manufacturer) :: productName :: Nil,
_, _,_), _, _) if manufacturer.contains(productName) =
val product = manufacturer.getProduct(productName)
sucks because it looks up the product twice.
2. some time of nested case?
case RewriteRequest(
ParsePath( Manufacturer(manufacturer) :: Product(manufacturer,
product) :: Nil, _, _,_), _, _) =
obviously doesn't work..
any suggestions welcome, thanks!
You could write you own extractor. Here's an example from production
code :-)
override val rewrite: LocRewrite = Full(NamedPF(name) {
case RewriteRequest(ParamsExtractor(account,orgUnit) , _, _) =
(RewriteResponse(path), Full(account, orgUnit))
})
object ParamsExtractor {
def unapply(pp:ParsePath): Option[(Account, OrgUnit)] = {
val result:Box[(Account, OrgUnit)] = if (pp.wholePath.startsWith(path)
pp.wholePath.length == (path.length + 2)) {
val res = for {decrypted1 -
FleetZoneRules.decrypt(pp.wholePath(path.length))
account -
urlAccount.is.choice(Full(_))(Account.find(decrypted1))
decrypted2 - FleetZoneRules.decrypt(pp.wholePath.last)
orgUnit -
urlOrgUnit.is.choice(Full(_))(OrgUnit.find(decrypted2)) if (orgUnit.account ==
account)} yield {
urlAccount(Full(account))
urlOrgUnit(Full(orgUnit))
(account, orgUnit)
}
log.debug(Decoded URL: %s=%s.format(pp,res))
res
}
else
None
result
}
}
/Jeppe
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