Leaf/LeafEncoder.swift:162: Fatal error after passing DB-Data to a Leaf-View

[j-goette]

Hi together,

When I try to pass any object to a view via render function, I get the error: "Leaf/LeafEncoder.swift:162: Fatal error."

In this example, I pull a list of cocktails from the database, put them into context and try to pass them to the view:

app.get("dashboard")` { req async throws -> View in
        let result = try await Cocktail.query(on: req.db).all()
        let context = CocktailContext(cocktails: result)
        
        return try await req.view.render("dashboard", context)
    }

Here is my Context Struct:

struct CocktailContext: Codable, Content {
    let cocktails: [Cocktail]
}

Here is my Cocktail Model:

import Fluent
import Vapor

final class Cocktail: Model, Content, Codable {
    static let schema = "cocktail"
    
    @ID(key: .id)
    var id: UUID?

    @Field(key: "name")
    var name: String
    
    @Field(key: "description")
    var description: String
    
    @Field(key: "amount_ml")
    var amount_ml: Int
    
    @Field(key: "img_url")
    var img_url: String
    
    @OptionalField(key: "video_url")
    var video_url: String?
    
    @Parent(key: "difficulty_id")
    var difficulty_id: Difficulty
    
    @Parent(key: "glass_id")
    var glass_id: Glass
}

This happens not only with the database output but also when I try to create a cocktail object directly, for example. Or with other Object:

return try await req.view.render("dashboard", Difficulty(id: UUID(), difficulty: "med"))

Even if it is deliberate behavior, there is no information about what the error is! I mean, I may make a mistake, but since the application throws a fatal error without description at this point, I have no idea how to deal with it.

I use Vapor 4.65.0 and Leaf 4.2.0 on MacOS Monterey

Kind regards

Jannik

[0xTim]

This looks like it was fixed in 4.2.1 - https://github.com/vapor/leaf/releases/tag/4.2.1 - please try upgrading

[j-goette]

Jup. Now it is working! Sorry for this useless Issues Post.