Don't want to pass arguments each .render call

[Dan-Do]

I already have a site using ecr engine. Now I want to migrate it to use crinja engine. Take an example for this code: name = "Foo"

• In ecr, I just call macro render without parameters then the engine automatically gets the existing variable render "Hello <%= name %>" #=> Hello Foo
• But in crinja, I have to pass the parameter evertime calling .render method crinja.render "Hello {{ name }}", { "name" => name }

As far as I know, ecr embed the template string directly to program code. Is it possible to config crinja make it behave as ecr? I want to migrate as least as possible :)

[straight-shoota]

Is it possible to config crinja make it behave as ecr?

Crinja templates are evaluated at runtime. Everything Crinja can see from Crystal land needs to be explicitly exposed. The most common way to do that is binding objects that implement Crinja::Object. An easy helper for this is Crinja::Object::Auto. With ECR I assume you're already using some kind of view type that defines the name property etc. You just need to make that object implement Crinja::Object and bind it to the runtime.

But you actually don't need to pass variable bindings directly to the render method. It will use the current context by default and the method argumens on top. The Crinja environment has a context method which exposes the context. It can also be configured at initialization and using with_context method.

[Dan-Do]

I made it by adding objects/variables to the current context. crinja = Crinja.new ... # now render crinja.context.scope["foo"] = Crinja.value(bar) #or crinja.context.merge! { foo: bar } template = crinja.get_template("login.html") template.render With this I can keep my current syntax. The thing is I have to merge the context every render. Anyway thank you :)

[straight-shoota]

The thing is I have to merge the context every render.

You shouldn't have to do that. Unless you need to assign different values per render? But then you can just assign them directly as arguments to render:

crinja = Crinja.new
crinja.context["variable_for_all_renders"] = Crinja.value(foo)
template = crinja.get_template("login.html")

template.render(variable_for_this_render: Crinja.value(bar)
template.render(variable_for_that_render: Crinja.value(baz)