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grails

Retrieveing id through url Grails

I am new to grails I am trying to retrieve an id from a url. I have domains called Beer and recipe. Beer hasMany recipes and recipe belongsTo beer. I want to create a link to a new recipe from the beer show page passing the beer id in the url.

I know I need a URL along the lines of /recipe/create?beerid= and then apply that as a value to a form field for submission. How would I do this?

Solution

  • beer show action

    def show(Beer beer) {
    respond beer
}

    beer show.gsp

    <g:link controller="recpie" action="create" resource="recipe" params="[beerid: beer.id]">Create Recipe</g:link>