I got and issue with relationships between simple data in a small laravel project.

I have a recipes table that list recipes, and I got a recipe_types table listing the type of recipe. In my recipes table, I got a column recipe_types_id that is a foreign key referring to the id column of the recipe_types table.

In Laravel, I have a view, where I want to list all the recipes, where I show the Recipe Name and the Recipe Type name.

A recipe can only have 1 type, but a type can be linked to multiple recipes.

Now in the Recipe model I added this:

public function recipeType()
{
   return $this->hasOne(RecipeType::class,'id');
}

I am pretty sure that the relationship hasOne is the right one, but because of the issue I have, I start having doubts.

and in my RecipeController, I retrieve all the post like this :

public function index()
{
    $recipes = Recipe::with('recipeType')->get();

    return view('recipes')->with('recipes', $recipes);
}

The issue I have right now, it's that when I display in my blade view the Recipe of ID 1 (with a recipe_type_id of 3), when I Use {{ $recipe->recipeType->name }}, that return the name of the recipe_type with the ID 1 and not the recipe_type with the ID 3.

Here example of the data, current behavior and expected behavior :

=== Recipe Table ===
{id: 1, name: 'Chocolate Cake', recipe_type_id: 3},
{id: 2, name: 'Carrot soup', recipe_type_id: 1}

=== Recipe Type Table ===
{id: 1, name: 'Soup'},
{id: 2, name: 'Main plate'},
{id: 3, name: 'Dessert'}

In my listing what I got now (the type ID retrieved is the ID of the Recipe):

• Recipe 1
  • Name: Chocolate Cake
  • Type: Soup
• Recipe 2
  • Name: Carrot soup
  • Type: Main plate

In my listing what I want and should have :

• Recipe 1
  • Name: Chocolate Cake
  • Type: Dessert
• Recipe 2
  • Name: Carrot soup
  • Type: Soup

Have you an idea of what I have been missing? I read the documentation, look on google and here on StackOverflow, I found solutions that I thought would help me, but they didn't, and I become frustrated not been able to complete what should be simple I think(?)

Thank you very much for your help.

CodePudding user response：

In your case, you have Recipe which belongs to one RecipeType.

Try like this:

public function recipeType()
{
   return $this->belongsTo(RecipeType::class, 'recipe_types_id', 'id');
}

In the docs you can imagine your model RecipeType as Post and Recipe as Comment.

Recipe belongs to only one RecipeType, RecipeType can have many Recipe.

I hope I helped you to understand.