问题
How could i structure data for following scenario?
There is an app called Food Ordering System. It contains
Username(Who is registering this restaurant menus for online order)
Restaurant_name
Description
Location
Estimated Delivery
Menu(Has multiple menus for one restaurant)
My design
"restaurant":{
"username":{
"restaurant_name":"KFC Restaurant",
"description":"short description on restaurant",
"estimated delivery":"1hour/km",
"distance":"20km away",
"location":"Kathmandu",
"rating":"rating star up to 5",
"menus":{
"menu":{
"item":"buff momo",
"price":"$5",
"rating":"rating star up to 5"
},
"menu":{
"item":"Fried Chicken",
"price":"$10",
"rating":"rating star up to 5"
},
"menu":{
"item":"BBQ",
"price":"$20",
"rating":"rating star up to 5"
}
}
}
}
Is my design the best practice design?
回答1:
It actually depends on what you want to do with this data.
If in your website you want to show a list of all restaurant and when you click on restaurant show the list of menu they are offering, storing the menu inside the restaurant might not be a good idea.
Because according to the doc :
When we read a data node in our Firebase database, we also retrieve all of its children!
(the old one) https://www.firebase.com/docs/rest/guide/structuring-data.html#section-denormalizing-data
Also, imagine if you want to do a search bar and look for a menu (like chicken nuggets) and return the list of restaurant offering this I would design your database this way:
"restaurant":{
"$username":{
"restaurant_name":"KFC Restaurant",
"description":"short description on restaurant",
"estimated delivery":"1hour/km",
"distance":"20km away",
"location":"Kathmandu",
"rating":"rating star up to 5",
...
}
}
"menus":{
"$username" : {
"menu":{
"item":"buff momo",
"price":"$5",
"rating":"rating star up to 5"
},
"menu":{
"item":"Fried Chicken",
"price":"$10",
"rating":"rating star up to 5"
},
"menu":{
"item":"BBQ",
"price":"$20",
"rating":"rating star up to 5"
}
}
}
来源：https://stackoverflow.com/questions/37345365/best-practice-data-design-in-firebase