Rails provide different ways to load associations from database to avoid N + 1 query being fired.
I have two models User
and Post
with following associations:
# app/models/user.rb
class User < ActiveRecord::Base
has_many :posts
end
Rails provide different ways to load associations from database to avoid N + 1 query being fired.
I have two models User
and Post
with following associations:
# app/models/user.rb
class User < ActiveRecord::Base
has_many :posts
end
{ | |
"auto_indent": true, /* Optional */ | |
"draw_white_space": "all", /* Optional */ | |
"ensure_newline_at_eof_on_save": true, /* Recommended */ | |
"rulers": | |
[ | |
80 | |
], /* Optional */ | |
"smart_indent": true, /* Optional */ | |
"tab_size": 2, /* Recommended */ |
Badge | Category | Description |
---|---|---|
Informed | Bronze | Read the entire tour page. |
Educated | Bronze | Read the documentation tour. |
Autobiographer | Bronze | Complete "About Me" section of user profile |
Supporter | Bronze | First up vote. |
Backer | Bronze | First example up vote. |
Citizen Patrol | Bronze | First flagged post. |
Suffrage | Bronze | Use 30 votes in a day. |
curl -X POST \ | |
-F "scrape=true" \ | |
-F "id=https://website.com" \ | |
https://graph.facebook.com |
created_at
and rails will display them by converting into the application timeoneconfig.time_zone = 'Eastern Time (US & Canada)'
config.active_record.default_timezone = :utc
Supports :utc
and :local
Time.current
wherever possibleMessage.where(created_at: '19/01/2018'.to_time.beginning_of_day..'19/01/2018'.to_time.end_of_day)
Message Exists (0.2ms) SELECT 1 AS one FROM "messages" WHERE ("messages"."created_at" BETWEEN ? AND ?) LIMIT ? [["created_at", "2018-01-18 18:30:00"], ["created_at", "2018-01-19 18:29:59.999999"], ["LIMIT", 1]]
Message Load (0.1ms) SELECT "messages".* FROM "messages" WHERE ("messages"."created_at" BETWEEN ? AND ?) [["created_at", "2018-01-18 18:30:00"], ["created_at", "2018-01-19 18:29:59.999999"]]
class StringValidator | |
ALLOWED_PARANTHESIS = { | |
')' => '(', | |
'}' => '{', | |
']' => '[' | |
}.freeze | |
def initialize(value = '') | |
@text = value | |
end |