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  • Important Methods of Date in Ruby

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    We often stuck, how to manipulate Date in our rails Application.

     

    We have two Date objects in Ruby

    Time.now()   // This will give Today's date
    #=> 2016-05-17 17:02:28 +0530
    Date.new()   // This will need some arguments to pass.
    #=> Mon, 01 Jan -4712  //Otherwise this will give result like this

    Time.now() always return the Today's date with the Time Zone, you are working in.

     

    While Date.new() is the new object of Date. we can create an object by passing arguments.

     

    for example

    Date.new(1991)
     => Tue, 01 Jan 1991
    
    Date.new(1991,3)
     => Fri, 01 Mar 1991
    
    Date.new(1991,3,17)
     => Sun, 17 Mar 1991

    Now, Lets talk about Date in Active Record.

     

    We can Fetch results by the created_by of any record. Then

    #Data for current week
    
    Article.where(created_by:(Date.today.beginning_of_week..Date.today.end_of_week))
    # =>  Article Load (0.6ms)  SELECT "articles".* FROM "articles" WHERE ("articles"."created_by" BETWEEN '2016-05-16' AND '2016-05-22')
    
    #Data for current month
    
    Article.where(created_by: (Date.today.beginning_of_month..Date.today.end_of_month))
    # =>  Article Load (0.6ms)  SELECT "articles".* FROM "articles" WHERE ("articles"."created_by" BETWEEN '2016-05-01' AND '2016-05-31')
    
    #Data for current year
    
    Article.where(created_by: (Date.today.beginning_of_year..Date.today.end_of_year))
     # => Article Load (0.7ms)  SELECT "articles".* FROM "articles" WHERE ("articles"."created_by" BETWEEN '2016-01-01' AND '2016-12-31')
    
    
    #Data for current weekdays
    
    Article.where(created_by: (Date.today.beginning_of_week..Date.today.end_of_week-2))
    # =>  Article Load (0.6ms)  SELECT "articles".* FROM "articles" WHERE ("articles"."created_by" BETWEEN '2016-05-16' AND '2016-05-20')
    
    #Data for current weekends
    
    Article.where(created_by: (Date.today.end_of_week-1..Date.today.end_of_week))
    # =>  Article Load (0.6ms)  SELECT "articles".* FROM "articles" WHERE ("articles"."created_by" BETWEEN '2016-05-21' AND '2016-05-22')
    
    #Data for particular weekends
    
    new_date = Date.new(1991,8,15)
     => Thu, 15 Aug 1991
    
    Article.where(created_by: (new_date.end_of_week-1..new_date.end_of_week))
    #=>  Article Load (0.6ms)  SELECT "articles".* FROM "articles" WHERE ("articles"."created_by" BETWEEN '1991-08-17' AND '1991-08-18')

    There are many more methods but these are some which we must care about

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