On rails console output what does it mean #< at the start of the hash on the following example?:
irb(main):003:0> a=Movie.all
Movie Load (0.5ms) SELECT "movies".* FROM "movies"
=> [#<Movie id: 1, title: "Aladdin", rating: "G", description: nil, release_date: "1992-11-25 00:00:00", created_at: "2013-07-27 21:29:01", updated_at: "2013-07-27 21:29:01">, # <Movie id: 2, title: "The Terminator", rating: "R", description: nil, release_date: "1984-10- 26 00:00:00", created_at: "2013-07-27 21:29:01", updated_at: "2013-07-27 21:29:01">, #<Movie id: 3, title: "When Harry Met Sally", rating: "R", description: nil, release_date: "1989-07-21 00:00:00", created_at: "2013-07-27 21:29:01", updated_at: "2013-07-27 21:29:01">,... more output
That's how an object is printed in ruby, for example and instance of class Movie would be printed something like this:
<#Movie:0x003247fa... >
| |
class memory position I think
What you have there is a set of this previous writing:
[ one_object, other_object ... ]
To have a better display you could use hirb.
#< means that this is an instance of the Movie class.
Related
When I create a new admin user, there are three objects of translations:
Admin.last.translations.map(&:locale) # => [:ru, :uz, :uz]
Why are the locales duplicated?
Example:
admin.position_uz = 'CTO'
admin.position_ru = 'CTO'
admin.save!
admin.translations.count = 3
admin.translations.first.position = 'CTO'
admin.translations.second.position = 'Another value or empty'
admin.translations.third.position = 'CTO'
Every time the locale is set to uz, it shows the second variant.
Admin translations loo like
[
#<Admin::Translation id: 1, admin_id: 2, locale: "ru", position: "CTO", created_at: "2019-01-16 06:24:17", updated_at: "2019-01-16 06:30:31">,
#<Admin::Translation id: 2, admin_id: 2, locale: "uz", position: "Board Member", created_at: "2015-07-26 20:42:18", updated_at: "2015-07-26 20:42:18">,
#<Admin::Translation id: 3, admin_id: 2, locale: "uz", position: "CS manager", created_at: "2019-01-16 06:24:17", updated_at: "2019-01-16 07:09:21">
]
I have a model called Event, where I have stored_accessor "list" (stored like data: {"list"=>[{"key"=>"key1", "value"=>"value1"}]}).
I need to make a search query o
#<Event id: "1", title: "HHHH", description: nil, data: {"list"=>[{"key"=>"key1", "value"=>"value1"}, {"key"=>"key2", "value"=>"value2"}]}, created_at: "2017-04-14 21:06:22", updated_at: "2017-04-20 10:36:08">
#<Event id: "2", title: "HHHH", description: nil, data: {"list"=>[{"key"=>"key1", "value"=>"value1"}]}, created_at: "2017-04-14 21:06:22", updated_at: "2017-04-20 10:36:08">
#<Event id: "3", title: "HHHH", description: nil, data: {"list"=>[{"key"=>"key11", "value"=>"value11"}, {"key"=>"key12", "value"=>"value12"}]}, created_at: "2017-04-14 21:07:22", updated_at: "2017-04-20 10:37:08">
#<Event id: "4", title: "HHHH", description: nil, data: {"list"=>[{"key"=>"key111", "value"=>"value111"}, {"key"=>"key112", "value"=>"value112"}]}, created_at: "2017-04-14 21:08:22", updated_at: "2017-04-20 10:38:08">
I have a serach params like
1) {'key'=> 'key1', 'value'=> 'value1'}
2) ["key"=>"key1", "value"=>"value1"}, {"key"=>"key2", "value"=>"value2"}]
In first case, it should return Event id 1 and 2.
In second case, it should return Event id 1. (event if return 1 and 2 both could be acceptable).
I am not sure with json and array combination.
Please help.
You may do it with PostgreSQL jsonb's operator #>. Also you need to write the full path for search params: {'list' => [{'key'=> 'key1', 'value'=> 'value1'}]}. Try this code:
to_contain1 = {'list' => [{'key'=> 'key1', 'value'=> 'value1'}]}
to_contain2 = {'list' => [{'key'=> 'key2', 'value'=> 'value2'}]}
Event.
where("data #> ?", to_contain1.to_json})
# returns events 1 & 2
Event.
where("data #> ?", to_contain1.to_json).
where("data #> ?", to_contain2.to_json)
# returns event 1
if i give
p #work_orders.where(wo_number: 34305)
in my controller, o/p in terminal will be
#<ActiveRecord::Relation [#<WorkOrder id: 9168, shop_number: 3, ticket_number: 0, wo_number: 34305, date: "2014-04-02 02:24:57", time: "2000-01-01 15:54:57", customerPO: "", warranty_code: "1", market_source: "", sub_total: #<BigDecimal:bba2164,'0.72456E3',18(18)>, discount_type: "dollar", discount_amount: #<BigDecimal:bba20b0,'0.0',9(18)>, tax: #<BigDecimal:bba2038,'0.39E0',9(18)>, tax_exemptID: "", order_type: "regular", created_at: "2014-07-17 06:25:26", updated_at: "2014-07-17 06:25:26">]>
i'm trying to retrieve the value of subtotal..
This is so far i have tried..
p #work_orders.where(wo_number: 34305).first.sub_total
that resulted in error
undefined method `sub_total' for nil:NilClass
When I call:
preivous_lessons = #item.where("track_id = ?", lesson.track_id)
I get this active record realtion:
[#<CodeLesson id: 2, name: "Python", permalink: "python", lesson_content: "", instructions: "Print your name to the console.", hints: "", starting_code: "\"\"\"\r\nThis is a comment\r\n\"\"\"\r\n\r\nprint(\"Hello, World\"...", language_id: "12", order: 1, track_id: 2, user_id: 1, created_at: "2014-02-14 16:01:12", updated_at: "2014-02-15 21:14:43", visible: true>, #<CodeLesson id: 8, name: "Test Lesson", permalink: "test-lesson", lesson_content: nil, instructions: nil, hints: nil, starting_code: nil, language_id: "26", order: nil, track_id: 2, user_id: 1, created_at: "2014-02-20 19:23:15", updated_at: "2014-02-20 19:23:15", visible: false>]
How do I convert this into a usable array of models so I can do something like this:
preivous_lessons.each do |i|
highest = i.order if i.order > highest
end
As OP confirmed from my comment, that my hint solved his problem, I am putting it as an answer to the post :
preivous_lessons = #item.where("track_id = ?", lesson.track_id)
highest = preivous_lessons.maximum(:order)
Documentation of maximum :
Calculates the maximum value on a given column. The value is returned with the same data type of the column, or nil if there's no row.
preivous_lessons = #item.where("track_id = ?", lesson.track_id).all
I have such array data:
[#<PriceList id: 463134, distributor_id: 6, brand: "Mann-filter", article_nr: "W712/22", price: 5405.0, quantity: "50", waittime: 1, description: "Фильтр масл OPEL 1.2-3.0L (OC90)", created_at: "2013-01-30 16:35:34", updated_at: "2013-01-30 16:35:34", art_group: "Фильтр масл OPEL 1.2-3.0L (OC90)", oem_number: nil>, #<PriceList id: 517164, distributor_id: 6, brand: "Mann-filter", article_nr: "W712/22", price: 5442.0, quantity: "500", waittime: 3, description: "Фильтр масляный OPEL/GM/DAEWOO", created_at: "2013-01-30 16:42:26", updated_at: "2013-01-30 16:42:26", art_group: "Фильтр масляный OPEL/GM/DAEWOO", oem_number: nil>, #<PriceList id: 463135, distributor_id: 6, brand: "Mann-filter", article_nr: "W712/22(10)", price: 5101.0, quantity: "20", waittime: 1, description: "Фильтр масл.без упак.OPEL/GM (OC90Of)", created_at: "2013-01-30 16:35:34", updated_at: "2013-01-30 16:35:34", art_group: "Фильтр масл.без упак.OPEL/GM (OC90Of)", oem_number: nil>, ... etc
how can i change price type?
i try
#non_original2 = #non_original2.map { |e| e[:price].to_i }
but as result i see only price values... How can i change my array, so that price field in all hashes become integer value?
what about
#non_original2.each { |e| e[:price] = e[:price].to_i }
This changes every PriceList item in the list (and does not copy the list).
Using your approach results in a list of price values, because map collects the result of the block. The result of e[:price].to_i is an integer (the prices you see).