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ahmadhasankhan/1_user.rb

Forked from ericktai/1_user.rb
Last active November 26, 2017 19:24
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Raw
1_user.rb
class User < ApplicationRecord
has_many :posts
has_many :comments
# id :integer not null, primary key
# name :string(50) default("")
end
Raw
2_post.rb
class Post < ApplicationRecord
belongs_to :user
has_many :comments
# id :integer not null, primary key
# user_id :integer
# content :text default("")
# created_at :datetime
DEFAULT_PAGE_LIMIT = 50
# By default fetching records in descending order, however, we can always override the default scope using unscoped method
default_scope -> { order(created_at: :desc) }
# We can reuse this anywhere and pass the different limit as per the need, By default limit is 50
scope :most_recent, ->(limit = DEFAULT_PAGE_LIMIT) { preload_conditions.limit(limit) }
# This will preload related objects when you include it in the query
def self.preload_conditions
includes(:user, comments: [:user])
end
end
Raw
3_comment.rb
class Comment < ApplicationRecord
belongs_to :user
belongs_to :post
# id :integer not null, primary key
# user_id :integer
# post_id :integer
# content :text default("")
# created_at :datetime
end
Raw
4_newsfeed_controller.rb
class NewsfeedController < ApplicationController
# JSON endpoint that returns an array of Post objects in order of
# newest first, to oldest last. Each Post contains a User object
# (the author of the Post), and an array of Comments. Each Comment
# will also include the User object of the Comment's author.
# TODO: Newsfeed endpoint here
def index
@news_feeds = Post.most_recent.paginate(page: params[:page], per_page: 50)
end
end
Raw
5_example.json
[
{
"type": "Post",
"content": "First post",
"user": {
"type": "User",
"name": "Luke"
},
"comments": [
{
"type": "Comment",
"user": {
"type": "User",
"name": "Leia"
},
"content": "First comment"
},
{
"type": "Comment",
"user": {
"type": "User",
"name": "Han"
},
"content": "Second comment"
},
]
},
{
"type": "Post",
"content": "Second post",
"user": {
"type": "User",
"name": "Darth Vader"
},
"comments": [
{
"type": "Comment",
"user": {
"type": "User",
"name": "Boba Fett"
},
"content": "Third comment"
},
{
"type": "Comment",
"user": {
"type": "User",
"name": "Jabba"
},
"content": "Fourth comment"
},
]
}
]
Raw
newsfeed-_comment.json.jbuilder
json.comments comments do |comment|
json.type comment.class.name
json.partial! 'newsfeed/user', user: comment.user
json.content comment.content
end
Raw
newsfeed-_feed.json.jbuilder
json.type post.class.name
json.content post.content
json.partial! 'newsfeed/user', user: post.user
json.partial! 'newsfeed/comment', comments: post.comments
Raw
newsfeed-_user.json.jbuilder
json.user do
json.type user.class.name
json.name user.name
end
Raw
newsfeed-index.json.jbuilder
json.array! @news_feeds, partial: 'newsfeed/feed', as: :post
Raw
output.json
[
{
"type": "Post",
"content": "using loop 50",
"user": {
"type": "User",
"name": "ahmad"
},
"comments": []
},
{
"type": "Post",
"content": "using loop 49",
"user": {
"type": "User",
"name": "ahmad"
},
"comments": [
{
"type": "Comment",
"user": {
"type": "User",
"name": "ahmad"
},
"content": "This is comment 56"
}
]
},
{
"type": "Post",
"content": "using loop 48",
"user": {
"type": "User",
"name": "ahmad"
},
"comments": [
{
"type": "Comment",
"user": {
"type": "User",
"name": "ahmad"
},
"content": "This is comment 54"
},
{
"type": "Comment",
"user": {
"type": "User",
"name": "Hassan"
},
"content": "This is comment 55"
}
]
},
{
"type": "Post",
"content": "using loop 47",
"user": {
"type": "User",
"name": "ahmad"
},
"comments": [
{
"type": "Comment",
"user": {
"type": "User",
"name": "ahmad"
},
"content": "This is comment 51"
},
{
"type": "Comment",
"user": {
"type": "User",
"name": "ahmad"
},
"content": "This is comment 52"
},
{
"type": "Comment",
"user": {
"type": "User",
"name": "ahmad"
},
"content": "This is comment 53"
}
]
},
{
"type": "Post",
"content": "using loop 46",
"user": {
"type": "User",
"name": "ahmad"
},
"comments": []
},
{
"type": "Post",
"content": "using loop 45",
"user": {
"type": "User",
"name": "ahmad"
},
"comments": []
},
{
"type": "Post",
"content": "using loop 44",
"user": {
"type": "User",
"name": "ahmad"
},
"comments": []
},
{
"type": "Post",
"content": "using loop 43",
"user": {
"type": "User",
"name": "ahmad"
},
"comments": []
},
{
"type": "Post",
"content": "using loop 41",
"user": {
"type": "User",
"name": "ahmad"
},
"comments": [
{
"type": "Comment",
"user": {
"type": "User",
"name": "ahmad"
},
"content": "This is comment 49"
}
]
},
{
"type": "Post",
"content": "using loop 42",
"user": {
"type": "User",
"name": "ahmad"
},
"comments": [
{
"type": "Comment",
"user": {
"type": "User",
"name": "Hassan"
},
"content": "This is comment 50"
}
]
},
{
"type": "Post",
"content": "using loop 0",
"user": {
"type": "User",
"name": "ahmad"
},
"comments": [
{
"type": "Comment",
"user": {
"type": "User",
"name": "ahmad"
},
"content": "This is comment 8"
}
]
},
{
"type": "Post",
"content": "using loop 1",
"user": {
"type": "User",
"name": "ahmad"
},
"comments": [
{
"type": "Comment",
"user": {
"type": "User",
"name": "ahmad"
},
"content": "This is comment 9"
}
]
},
{
"type": "Post",
"content": "using loop 2",
"user": {
"type": "User",
"name": "ahmad"
},
"comments": [
{
"type": "Comment",
"user": {
"type": "User",
"name": "ahmad"
},
"content": "This is comment 10"
}
]
},
{
"type": "Post",
"content": "using loop 3",
"user": {
"type": "User",
"name": "ahmad"
},
"comments": [
{
"type": "Comment",
"user": {
"type": "User",
"name": "ahmad"
},
"content": "This is comment 11"
}
]
},
{
"type": "Post",
"content": "using loop 4",
"user": {
"type": "User",
"name": "ahmad"
},
"comments": [
{
"type": "Comment",
"user": {
"type": "User",
"name": "ahmad"
},
"content": "This is comment 12"
}
]
},
{
"type": "Post",
"content": "using loop 5",
"user": {
"type": "User",
"name": "ahmad"
},
"comments": [
{
"type": "Comment",
"user": {
"type": "User",
"name": "ahmad"
},
"content": "This is comment 13"
}
]
},
{
"type": "Post",
"content": "using loop 6",
"user": {
"type": "User",
"name": "ahmad"
},
"comments": [
{
"type": "Comment",
"user": {
"type": "User",
"name": "ahmad"
},
"content": "This is comment 14"
}
]
},
{
"type": "Post",
"content": "using loop 7",
"user": {
"type": "User",
"name": "ahmad"
},
"comments": [
{
"type": "Comment",
"user": {
"type": "User",
"name": "ahmad"
},
"content": "This is comment 15"
}
]
},
{
"type": "Post",
"content": "using loop 8",
"user": {
"type": "User",
"name": "ahmad"
},
"comments": [
{
"type": "Comment",
"user": {
"type": "User",
"name": "ahmad"
},
"content": "This is comment 16"
}
]
},
{
"type": "Post",
"content": "using loop 9",
"user": {
"type": "User",
"name": "ahmad"
},
"comments": [
{
"type": "Comment",
"user": {
"type": "User",
"name": "ahmad"
},
"content": "This is comment 17"
}
]
},
{
"type": "Post",
"content": "using loop 10",
"user": {
"type": "User",
"name": "ahmad"
},
"comments": [
{
"type": "Comment",
"user": {
"type": "User",
"name": "ahmad"
},
"content": "This is comment 18"
}
]
},
{
"type": "Post",
"content": "using loop 11",
"user": {
"type": "User",
"name": "ahmad"
},
"comments": [
{
"type": "Comment",
"user": {
"type": "User",
"name": "ahmad"
},
"content": "This is comment 19"
}
]
},
{
"type": "Post",
"content": "using loop 12",
"user": {
"type": "User",
"name": "ahmad"
},
"comments": [
{
"type": "Comment",
"user": {
"type": "User",
"name": "ahmad"
},
"content": "This is comment 20"
}
]
},
{
"type": "Post",
"content": "using loop 13",
"user": {
"type": "User",
"name": "ahmad"
},
"comments": [
{
"type": "Comment",
"user": {
"type": "User",
"name": "ahmad"
},
"content": "This is comment 21"
}
]
},
{
"type": "Post",
"content": "using loop 14",
"user": {
"type": "User",
"name": "ahmad"
},
"comments": [
{
"type": "Comment",
"user": {
"type": "User",
"name": "ahmad"
},
"content": "This is comment 22"
}
]
},
{
"type": "Post",
"content": "using loop 15",
"user": {
"type": "User",
"name": "ahmad"
},
"comments": [
{
"type": "Comment",
"user": {
"type": "User",
"name": "ahmad"
},
"content": "This is comment 23"
}
]
},
{
"type": "Post",
"content": "using loop 16",
"user": {
"type": "User",
"name": "ahmad"
},
"comments": [
{
"type": "Comment",
"user": {
"type": "User",
"name": "ahmad"
},
"content": "This is comment 24"
}
]
},
{
"type": "Post",
"content": "using loop 17",
"user": {
"type": "User",
"name": "ahmad"
},
"comments": [
{
"type": "Comment",
"user": {
"type": "User",
"name": "ahmad"
},
"content": "This is comment 25"
}
]
},
{
"type": "Post",
"content": "using loop 18",
"user": {
"type": "User",
"name": "ahmad"
},
"comments": [
{
"type": "Comment",
"user": {
"type": "User",
"name": "ahmad"
},
"content": "This is comment 26"
}
]
},
{
"type": "Post",
"content": "using loop 19",
"user": {
"type": "User",
"name": "ahmad"
},
"comments": [
{
"type": "Comment",
"user": {
"type": "User",
"name": "ahmad"
},
"content": "This is comment 27"
}
]
},
{
"type": "Post",
"content": "using loop 20",
"user": {
"type": "User",
"name": "ahmad"
},
"comments": [
{
"type": "Comment",
"user": {
"type": "User",
"name": "ahmad"
},
"content": "This is comment 28"
}
]
},
{
"type": "Post",
"content": "using loop 21",
"user": {
"type": "User",
"name": "ahmad"
},
"comments": [
{
"type": "Comment",
"user": {
"type": "User",
"name": "ahmad"
},
"content": "This is comment 29"
}
]
},
{
"type": "Post",
"content": "using loop 22",
"user": {
"type": "User",
"name": "ahmad"
},
"comments": [
{
"type": "Comment",
"user": {
"type": "User",
"name": "ahmad"
},
"content": "This is comment 30"
}
]
},
{
"type": "Post",
"content": "using loop 23",
"user": {
"type": "User",
"name": "ahmad"
},
"comments": [
{
"type": "Comment",
"user": {
"type": "User",
"name": "ahmad"
},
"content": "This is comment 31"
}
]
},
{
"type": "Post",
"content": "using loop 24",
"user": {
"type": "User",
"name": "ahmad"
},
"comments": [
{
"type": "Comment",
"user": {
"type": "User",
"name": "ahmad"
},
"content": "This is comment 32"
}
]
},
{
"type": "Post",
"content": "using loop 25",
"user": {
"type": "User",
"name": "ahmad"
},
"comments": [
{
"type": "Comment",
"user": {
"type": "User",
"name": "ahmad"
},
"content": "This is comment 33"
}
]
},
{
"type": "Post",
"content": "using loop 26",
"user": {
"type": "User",
"name": "ahmad"
},
"comments": [
{
"type": "Comment",
"user": {
"type": "User",
"name": "ahmad"
},
"content": "This is comment 34"
}
]
},
{
"type": "Post",
"content": "using loop 27",
"user": {
"type": "User",
"name": "ahmad"
},
"comments": [
{
"type": "Comment",
"user": {
"type": "User",
"name": "Hassan"
},
"content": "This is comment 35"
}
]
},
{
"type": "Post",
"content": "using loop 28",
"user": {
"type": "User",
"name": "ahmad"
},
"comments": [
{
"type": "Comment",
"user": {
"type": "User",
"name": "ahmad"
},
"content": "This is comment 36"
}
]
},
{
"type": "Post",
"content": "using loop 29",
"user": {
"type": "User",
"name": "ahmad"
},
"comments": [
{
"type": "Comment",
"user": {
"type": "User",
"name": "ahmad"
},
"content": "This is comment 37"
}
]
},
{
"type": "Post",
"content": "using loop 30",
"user": {
"type": "User",
"name": "ahmad"
},
"comments": [
{
"type": "Comment",
"user": {
"type": "User",
"name": "Hassan"
},
"content": "This is comment 38"
}
]
},
{
"type": "Post",
"content": "using loop 31",
"user": {
"type": "User",
"name": "ahmad"
},
"comments": [
{
"type": "Comment",
"user": {
"type": "User",
"name": "ahmad"
},
"content": "This is comment 39"
}
]
},
{
"type": "Post",
"content": "using loop 32",
"user": {
"type": "User",
"name": "ahmad"
},
"comments": [
{
"type": "Comment",
"user": {
"type": "User",
"name": "ahmad"
},
"content": "This is comment 40"
}
]
},
{
"type": "Post",
"content": "using loop 33",
"user": {
"type": "User",
"name": "ahmad"
},
"comments": [
{
"type": "Comment",
"user": {
"type": "User",
"name": "ahmad"
},
"content": "This is comment 41"
}
]
},
{
"type": "Post",
"content": "using loop 34",
"user": {
"type": "User",
"name": "ahmad"
},
"comments": [
{
"type": "Comment",
"user": {
"type": "User",
"name": "ahmad"
},
"content": "This is comment 42"
}
]
},
{
"type": "Post",
"content": "using loop 35",
"user": {
"type": "User",
"name": "ahmad"
},
"comments": [
{
"type": "Comment",
"user": {
"type": "User",
"name": "Hassan"
},
"content": "This is comment 43"
}
]
},
{
"type": "Post",
"content": "using loop 36",
"user": {
"type": "User",
"name": "ahmad"
},
"comments": [
{
"type": "Comment",
"user": {
"type": "User",
"name": "ahmad"
},
"content": "This is comment 44"
}
]
},
{
"type": "Post",
"content": "using loop 37",
"user": {
"type": "User",
"name": "ahmad"
},
"comments": [
{
"type": "Comment",
"user": {
"type": "User",
"name": "ahmad"
},
"content": "This is comment 45"
}
]
},
{
"type": "Post",
"content": "using loop 38",
"user": {
"type": "User",
"name": "ahmad"
},
"comments": [
{
"type": "Comment",
"user": {
"type": "User",
"name": "Hassan"
},
"content": "This is comment 46"
}
]
},
{
"type": "Post",
"content": "using loop 39",
"user": {
"type": "User",
"name": "ahmad"
},
"comments": [
{
"type": "Comment",
"user": {
"type": "User",
"name": "ahmad"
},
"content": "This is comment 47"
}
]
}
]
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