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I tried to define a custom tag that accepts a body, but the body is provided to the tag as [Syntax], which is not something that converts to the required return type of LeafData.
How can I capture the body, and return if necessary?
For context, I'm trying to create requireRole(role) tag, that returns the body if the role matches the role of the current user;
In the tag class I retrieve the body using ctx.requireBody(), which, as mentioned, returns an array of Syntax elements.
finalclassRequireRoleTag<A>:LeafTagwhere A:RoleAuthenticatable{init(userType:A.Type){}func render(_ ctx:LeafContext)throws->LeafData{try ctx.requireParameterCount(1)letbody=try ctx.requireBody()
guard let requiredRole = ctx.parameters[0].string else{throw"role is not a string"}
guard let req = ctx.request,let role =getRole(req: req)else{return.trueNil
}
if role == requiredRole {// This doesn't workreturn body
}return.trueNil
}privatefunc getRole(req:Request)->String?{leta= req.auth.get(A.self)return a?.role.description
}}
The text was updated successfully, but these errors were encountered:
+1, this feels like it should be straightforward as #requireRole is essentially syntactic sugar over #if.
A slightly more complex case that I was hoping to solve with a custom tag is injecting common variables without needing to set them in the view model. For example...
When building re-usable templates such as navigation, there are many use-cases for wanting common data available without needing to add all that common context to the view model/controller. I guess this could all be bundled up into some common view model type, but that's still extra code that's required.
I tried to define a custom tag that accepts a body, but the body is provided to the tag as
[Syntax]
, which is not something that converts to the required return type ofLeafData
.How can I capture the body, and return if necessary?
For context, I'm trying to create
requireRole(role)
tag, that returns the body if the role matches the role of the current user;In the tag class I retrieve the body using
ctx.requireBody()
, which, as mentioned, returns an array ofSyntax
elements.The text was updated successfully, but these errors were encountered: