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I'm trying to do a simple login form that just compare the value that you insert into the input in HTML to the data you had in the database. How can I do it?
Setup a controller and compare the params hash.
expected_value = '...'
if params[:form_value] == expected_value
do_something()
else
do_something_else()
end
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Currently, I have 3 columns : booking_date, booking_time_from, booking_time_to.
Problem is how can i get all data have booking time 2 hours ago using Active Support ?
Booking.where([booking_time], 2.hours.ago.to_datetime)
I'm not sure about what's the difference between booking_time_from and booking_time_to, and which column that the booking time you're referring here. Let's assume it's booking_time_to, you can
Booking.where("booking_time_to < ?", 2.hours.ago)
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Sorry for my English. I have a model with some field.
How to add a number to a current value in field?
I want to add the number several times
i generated scaffold.I use this to create modal. But i want to add number to a current value when i clicked submit
#foo = Foo.first
#foo.bar += 10
#which is a shorter way of saying #foo.bar = #foo.bar + 10
#foo.save
If this isn't helpful, please add some more details to your question, eg your example code you have so far.
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I am trying to populate column_name with items from #enc. Problem is #update_all updates all fields with last item in array?
Last item is "MPq3KSzDzLvTeYh+h00HD+5FAgKoNksykJhzROVZWbIJ36WNoBgkSoicJ5wx\nog0g\n".
I am trying to populate with all items from array not just last.
I hope question is clear?
I tried #update_attributes, but no success?
Help.
Thanks
#enc=["hUt7ocoih//kFpgEizBowBAdxqqbGV1jkKVipVJwJnPGoPtTN16ZAJvW9tsi\n3inn\n", "wGNyaoEZ09jSg+/IclWFGAXzwz5lXLxJTUKqCFIiOy3ZXRgdwFUsNf/75R2V\nZm83\n", "MPq3KSzDzLvTeYh+h00HD+5FAgKoNksykJhzROVZWbIJ36WNoBgkSoicJ5wx\nog0g\n"]
#enc.each do |i|
PaymentMethod.update_all(enc_number: i)
end
PaymentMethod.all.each_with_index do |payment, n = 0|
payment.update_column(:enc_number, #enc[n])
n +=1
end
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Here is my old query:
Dispenser.includes(:dispedus).includes(:educations).group('education.name')
To reiterate my post title please rewrite this to enable the same query in Rails 4.
Put in question form, how can this be rewritten to work in rails 4 ? ? ?
With multiple independent associations use commas:
Dispenser.joins(:dispedus, :educations).group('educations.name')
http://guides.rubyonrails.org/active_record_querying.html#joining-multiple-associations
With a nested join you can write:
Dispenser.joins(dispedus: :educations).group('educations.name')
http://guides.rubyonrails.org/active_record_querying.html#joining-nested-associations-single-level
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I have an array ['f_1', 'f_10', 'f_3', 'f_2']
I want to sort this array in ascending order using ruby one line code.
Do as below using sort_by :
['f_1', 'f_10', 'f_3', 'f_2'].sort_by { |s| s[/\d+/].to_i }
# => ["f_1", "f_2", "f_3", "f_10"]