class ratings at undefined( ) {
recipe_id
user_id
rating
};

class users at undefined( ) {
id
name
age
email
favourite_recipe_id
};

class recipes at undefined( ) {
id
name
author_id
instrctions
};

class recipe_ingredients at undefined( ) {
recipe_id
ingredient_id
amount
unit
};

class ingredients at undefined( ) {
id
name
};

dependency a1 from ratings to users at undefined( ) undefined( );
dependency a2 from ratings to recipes at undefined( ) undefined( );
dependency a3 from recipes to users at undefined( ) undefined( );
dependency a4 from users to recipes at undefined( ) undefined( );
dependency a5 from recipe_ingredients to recipes at undefined( ) undefined( );
dependency a6 from recipe_ingredients to ingredients at undefined( ) undefined( );