date problem in ruby

[amvis]

now am selecting one date from table, so  from that date i  have to retrieve the day of week, day of month,year... Some ways i have tried but didn't get that, actually i had tried with current date.

       time = Time.new

       time.wday

       time.month..

so how to pass one date,which is from table and find the above stuffs..?

[Colin Law]

are you saying that time.wday did not work?

$ irb
ruby-1.8.7-p302 > time=Time.new
=> Thu Feb 02 09:11:24 +0000 2012
ruby-1.8.7-p302 > time.wday
=> 4
ruby-1.8.7-p302 > time.month
=> 2
ruby-1.8.7-p302 >

Colin

[Peter Vandenabeele]

Time and Date are quite different. Think seriously on your business need what
you really need, a Time or a Date.

if you need a _date_ e.g. start_date of a contract, don't use Time, it will get
confusing when local time gets involved. The concept of

contract_start_date => "1 Feb 2012"

is different from the concept of

contract_start_time => "1 Feb 2012 00:00:00+00"

At contract_start_time (midnight in London) it is still 31 Jan 2011 7pm in NYC
and the contract has _not_ started yet to NY standards ...

HTH,

Peter

[amvis]

no, That is working... but i need like this

:bill_date => u.bill_date,

I want to take the day, month,year from this  u.bill_date. can i get, if am using like this

:day_of_week => Time.month(u.bill_date)

...........?

[Colin Law]

What type is bill_date? Assuming it is a Time or Date object then you want
u.bill_date.month

Colin

[amvis]

colin,  The data type of bill_date is date

Thank you

vishnu

[Colin Law]

On 2 February 2012 09:36, amvis <vgrkr...@gmail.com> wrote:
> colin,  The data type of bill_date is date

date is not a class type. It could be Date. Do you mean that the
column type in the database is date or that it is a string containing
a date or what? What does it show for the column type in schema.rb?

What happens when you do bill_date.month as I suggested?

By the way please remember to include the relevant parts of the
previous messages in your reply otherwise it is difficult to follow
the thread (particularly for those who may find the thread later and
hope to learn from it). Also please insert your reply at appropriate
point in previous message rather than posting at the top of the new
mail. Thanks.

Colin

>
>
> Thank you
> vishnu
>
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[amvis]

colin, thanks 

I got it from this

   :day_of_week =>u.bill_date.day,

    :day_of_month => (Date.new(Time.now.year,12,31).to_date<<(12-u.bill_date.month)).day ,

    :month_of_year =>u.bill_date.month,

    :year => u.bill_date.year

Thank you

vishnu

[amvis]

date is not a class type.  It could be Date.  Do you mean that the
column type in the database is date or that it is a string containing
a date or what?  What does it show for the column type in schema.rb?

What happens when you do bill_date.month as I suggested?

By the way please remember to include the relevant parts of the
previous messages in your reply otherwise it is difficult to follow
the thread (particularly for those who may find the thread later and
hope to learn from it).  Also please insert your reply at appropriate
point in previous message rather than posting at the top of the new
mail.  Thanks.

Colin

>
 Sorry i forgot that, i will follow that way  in next time....

Thank you

> Thank you
> vishnu
>
> 

[Colin Law]

On 2 February 2012 09:55, amvis <vgrkr...@gmail.com> wrote:
> colin, thanks
>
> I got it from this
>
>    :day_of_week =>u.bill_date.day,

Are you sure that does not give you the day of the month, I would have
expected wday to give day of week, though since you still have not
told use what type bill_date is then we cannot be sure.

>     :day_of_month =>
> (Date.new(Time.now.year,12,31).to_date<<(12-u.bill_date.month)).day ,

As I said above I would have expected day or mday to give the day of month

Colin

[amvis]

> I got it from this

 >  :day_of_week =>u.bill_date.day,

 >  :day_of_month => (Date.new(Time.now.year,12,31).to_date<<(12-u.bill_date.month)).day ,

 > :month_of_year =>u.bill_date.month,

 > :year => u.bill_date.year

Can i use this same way to get the day, month, year from the default field created_at..?

i mean :day_of_week =>u.created_at.day

i just tried that but got some error .day.. i think created_at field with timestamp. so that will be the problem...?

thank you

vishnu

[Colin Law]

On 2 February 2012 15:18, amvis <vgrkr...@gmail.com> wrote:
>> I got it from this
>
>  >  :day_of_week =>u.bill_date.day,
>  >  :day_of_month =>
> (Date.new(Time.now.year,12,31).to_date<<(12-u.bill_date.month)).day ,
>  > :month_of_year =>u.bill_date.month,
>  > :year => u.bill_date.year
>
>
> Can i use this same way to get the day, month, year from the default field
> created_at..?

Yest

>
> i mean :day_of_week =>u.created_at.day
>
> i just tried that but got some error .day.. i think created_at field with
> timestamp. so that will be the problem...?

If you get an error you have to look at it and work out what it means,
which is not always easy but you will get better at it with practice.
It is no good asking for help here and just saying you got some error,
you must provide the details, but first try and understand the error.
Also read up on and experiment with the rails console, it can be very
useful for trying things out, for example:

$ rails console
Loading development environment (Rails 3.1.3)
ruby-1.8.7-p302 > u=User.first
User Load (0.9ms) SELECT `users`.* FROM `users` LIMIT 1
=> #<User id: 1, <snip>, created_at: "2011-11-25 22:01:46",
updated_at: "2011-12-16 15:33:24", approved: true>
ruby-1.8.7-p302 > u.created_at.day
=> 25

Colin