I need to sort array of hashes:
resource = [{ 'resource_id' => 34,
'description' => 'NR00123',
'total_gross_amount_cents' => bank_transfer.amount_cents,
'contractor_name' => 'Bogisich Inc' },
{ 'resource_id' => 35,
'description' => bank_transfer.purpose,
'total_gross_amount_cents' => 54321,
'contractor' => 'Bogisich Inc' },
{ 'resource_id' => 36,
'description' => 'Some description 2',
'total_gross_amount_cents' => 0123,
'contractor' => bank_transfer.creditor_name
}
]
By following requirements:
first - match_invoice_number
def match_invoice_number(resource)
bank_transfer.purpose&.include?(resource['description'])
end
second - match_amount
def match_amount(resource)
bank_transfer.amount_cents == resource['total_gross_amount'] || resource['gross_amount_cents']
end
third - match_vendor
def match_vendor(resource)
resource['contractor'].include?(bank_transfer.creditor_name)
end
So at the end resource should be like:
resource = [
{ 'resource_id' => 35,
'description' => bank_transfer.purpose,
'total_gross_amount_cents' => 54_321,
'contractor' => 'Bogisich Inc' },
{ 'resource_id' => 34,
'description' => 'NR00123',
'total_gross_amount_cents' => bank_transfer.amount_cents,
'contractor_name' => 'Bogisich Inc' },
{ 'resource_id' => 36,
'description' => 'Some description 2',
'total_gross_amount_cents' => 0o123,
'contractor' => bank_transfer.creditor_name }
]
I was trying to use select but the end resource looks the same like at the beginning. Here what I use:
def only_suggested(resource)
resource.select do |resource|
collection(resource)
end
end
def collection(resource)
[match_invoice_number(resource), match_amount(resource), match_vendor(resource)]
end
collection(resource) method returns an array which treated as true value when select checks it, so you get your entire collection back. To sort you can use sort_by method. If you need to uplift an item that follows all conditions use all? method:
resource.sort_by do |resource|
collection(resource).all? ? 0 : 1 # To return sortable value
end
If conditions have different priorities:
resource.sort_by do |resource|
if match_invoice_number(resource)
0
elsif match_amount(resource)
1
elsif match_vendor(resource)
2
else
3
end
end
Related
Hash
data = {
:recordset => {
:row => {
:property => [
{:name => "Code", :value => "C0001"},
{:name => "Customer", :value => "ROSSI MARIO"}
]
}
},
:#xmlns => "http://localhost/test"
}
Code Used
result = data[:recordset][:row].each_with_object([]) do |hash, out|
out << hash[:property].each_with_object({}) do |h, o|
o[h[:name]] = h[:value]
end
end
I cannot get the following output:
[{"Code"=>"C0001", "Customer"=>"ROSSI MARIO", "Phone1"=>"1234567890"}
Error message:
TypeError no implicit conversion of Symbol into Integer
It works correctly in case of multi records
data = {
:recordset => {
:row => [{
:property => [
{:name => "Code", :value => "C0001"},
{:name => "Customer", :value => "ROSSI MARIO"},
{:name => "Phone1", :value => "1234567890"}
]
}, {
:property => [
{:name => "Code", :value => "C0002"},
{:name => "Customer", :value => "VERDE VINCENT"},
{:name => "Phone1", :value => "9876543210"},
{:name => "Phone2", :value => "2468101214"}
]
}]
},
:#xmlns => "http://localhost/test"
}
Code used
data.keys
#=> [:recordset, :#xmlns]
data[:recordset][:row].count
#=> 2 # There are 2 set of attribute-value pairs
result = data[:recordset][:row].each_with_object([]) do |hash, out|
out << hash[:property].each_with_object({}) do |h, o|
o[h[:name]] = h[:value]
end
end
#=> [
# {"Code"=>"C0001", "Customer"=>"ROSSI MARIO", "Phone1"=>"1234567890"},
# {"Code"=>"C0002", "Customer"=>"VERDE VINCENT", "Phone1"=>"9876543210", "Phone2"=>"2468101214"}
# ]
In the first case data[:recordset][:row] is not an Array, it's a Hash, so when you iterate it, the hash variable becomes the array:
[:property, [{:name=>"Code", :value=>"C0001"}, {:name=>"Customer", :value=>"ROSSI MARIO"}]]
In the second case, it's an Array, not a Hash, so when you iterate it, it becomes the hash:
{:property=>[{:name=>"Code", :value=>"C0001"}, {:name=>"Customer", :value=>"ROSSI MARIO"}, {:name=>"Phone1", :value=>"1234567890"}]}
You're always assuming it's the second format. You could force it into an array, and then flatten by 1 level to treat both instances the same:
result = [data[:recordset][:row]].flatten(1).each_with_object([]) do |hash, out|
out << hash[:property].each_with_object({}) do |h, o|
o[h[:name]] = h[:value]
end
end
# => [{"Code"=>"C0001", "Customer"=>"ROSSI MARIO"}] # result from example 1
# => [{"Code"=>"C0001", "Customer"=>"ROSSI MARIO", "Phone1"=>"1234567890"},
# {"Code"=>"C0002", "Customer"=>"VERDE VINCENT",
# "Phone1"=>"9876543210", "Phone2"=>"2468101214"}] # result from example 2
It's tempting to try and use Kernal#Array() instead of [].flatten(1), but you have to remember that Hash implements to_a to return a nested array of keys and values, so Kernal#Array() doesn't work like you'd want it to:
Array(data[:recordset][:row]) # using the first example data
# => [[:property, [{:name=>"Code", :value=>"C0001"}, {:name=>"Customer", :value=>"ROSSI MARIO"}]]]
You can create an array if it's not an array to normalize the input before processing it.
info = data[:recordset][:row]
info = [info] unless info.is_an? Array
result = info.each_with_object([]) do ....
I use jqgrid in my rails to show data in my web
and I want to decide which data to show depends on which page the user is surfing
here's the code
show.html.erb
<%=raw jqgrid("people_list", "people", "/people",
[ { :field => "pid", :label => "pid" ,:editable => true},
{ :field => "name", :label => "name" ,:editable => true},
{ :field => "gender", :label => "gender" ,:editable => true},
{ :field => "birthday", :label => "birthday" ,:editable => true}
] ,
{:autowidth=>true,:add => true,:edit => true,:delete => true,:view => true,:edit_url => post_data_people_url,:sortable_rows => 'true'
}
)%>
people_controller.rb
def index
index_columns ||= [:pid,:name,:gender,:birthday,:school]
current_page = params[:page] ? params[:page].to_i : 1
rows_per_page = params[:rows] ? params[:rows].to_i : 10
conditions={:page => current_page, :per_page => rows_per_page}
conditions[:order] = params["sidx"] + " " + params["sord"] unless (params[:sidx].blank? || params[:sord].blank?)
if params[:_search] == "true"
conditions[:conditions]=filter_by_conditions(index_columns)
end
#temp = Person.limit(0).all
KlassesPeople.where(:klass_id => 1).each do |stu|########
#temp.concat( Person.where(:id => stu.person_id) )
end
#people = #temp.paginate(conditions)
total_entries=#people.total_entries
respond_with(#people) do |format|
format.html
format.json { render :json => #people.to_jqgrid_json(index_columns, current_page, rows_per_page, total_entries)}
end
end
I want to pass the value of klass id from the jqgrid to the controller to determine the value of klass_id in the line with "########"
any idea?
I don't know how to format the code for you but you can use the postData parameter to pass a value to your controler every time the jqGrid would get data.
postData: { KeyName: KeyValue },
If you need to set this value dynamically you can set it via something like:
$('#gridName').jqGrid('setGridParam', { postData: { KeyName: KeyValue });
This is my code:
def return_rider_values(pol_option, pro_endorsement, prop_coverage, *par)
rider_values
par.each do |p|
rider_values << RiderValue.find_all_by_rider_id(p)
end
rider_hash = { }
rider_values.each do |rv|
if rv.attributes["name"].downcase == "yes"
rider_hash.merge!({par[0].to_s => rv.attributes['id'].to_s})
elsif rv.attributes["position"] == pol_option.to_i && rv.attributes["rider_id"] == par[1]
rider_hash.merge!({par[1].to_s => rv.attributes["id"].to_s})
elsif rv.attributes["position"] == prop_coverage.to_i && rv.attributes["rider_id"] == par[2]
rider_hash.merge!({par[2].to_s => rv.attributes["id"].to_s})
elsif rv.attributes["position"] == pro_endorsement.to_i && rv.attributes["rider_id"] == par[3]
rider_hash.merge!({par[3].to_s => rv.attributes["id"].to_s})
end
end
rider_hash
end
The output looks like this:
rider_hash #=> '22' -> 58
'23' -> 61
'25' -> 66
'26' -> 68
I was expecting, and need apparently since it's not working later down the line:
rider_hash #=> '22' -> '58'
'23' -> '61'
'25' -> '66'
'26' -> '68'
I don't know why the lookup function later in the program wants the ids to be strings instead of ints. I just know that it does, and I can't change it since lots of other methods use it.
I have to_s on both the hash key and value. I realize that in Ruby 1.9 to_s is an alias for inspect but even in the Hash documentation it says that, inspect or to_s is supposed to "Return the contents of this hash as a string."
So why is only the key being returned as a string?
You have an array of hashes so try this:
def return_rider_values
par = [1,2,3,6]
rider_hash = {}
rider_values = [element1: {:attributes => {:id => 1, :name => 'yes', :position => 1, :rider_id => 1}},
element2: {:attributes => {:id => 2, :name => 'no', :position => 2, :rider_id => 2}},
element3: {:attributes => {:id => 3, :name => 'something', :position => 1, :rider_id => 3}},
element4: {:attributes => {:id => 4, :name => 'something_else', :position => 2, :rider_id => 6}}]
rider_values.each_with_index do |hash, idx|
rider_values[idx].each_pair do |k, v|
if v[:attributes][:name].downcase == "yes"
rider_hash.merge!({par[0].to_s => v[:attributes][:id].to_s})
elsif v[:attributes][:position] == 2 && v[:attributes][:rider_id] == par[1]
rider_hash.merge!({par[1].to_s => v[:attributes][:id].to_s})
elsif v[:attributes][:position] == 3 && v[:attributes][:rider_id] == par[2]
rider_hash.merge!({par[2].to_s => v[:attributes][:id].to_s})
elsif v[:attributes][:position] == 4 && v[:attributes][:rider_id] == par[3]
rider_hash.merge!({par[3].to_s => v[:attributes][:id].to_s})
end
end
end
rider_hash
end
test = return_rider_values
puts test
output: #=> {"1"=>"1", "2"=>"2"}
I ended up getting what I wanted by adding this:
rider_hash.each{ |_,v| v.replace "'#{v}'"}
But this seems like a dirty solution somehow.
This is what I've been getting:
{:user=>{:employees=>{...}, :login=>"dernalia", :id=>1, :role=>2}}
What is generating the hash:
def management_tree(args = {})
args = {:users => [], :result => {}}.merge(args) #defaults
result = args[:result]
if not args[:users].include? self.login #prevent duplicates
result.merge!({:user => {:id => self.id,
:login => self.login,
:role => self.role,
:employees => employee_tree(args[:users] + [self.login], args[:result])
}
})
end
logger.info result.inspect
return result
end
def employee_tree(users, result)
if self.employees.length > 0
self.employees.each {|emp| (emp.management_tree({:users => users, :result => result})) }
end
return result
end
Now... it's supposed to return something like this:
{:user=>{:login=>"me", :id=>1, :role=>2,
:employees=>{
:user => {:login => "2", ...},
:user => {:login => "3",
:employees => {...}
}
}}
Some console output:
% bundle exec script/console
Loading development environment (Rails 2.3.8)
>> require "awesome_print"
=> []
>> ap User.find(1).management_tree[:employees]
nil
=> nil
>> ap User.find(1).management_tree
{
:user => {
:employees => {...},
:role => 2,
:login => "me",
:id => 1
}
}
=> {:user=>{:employees=>{...}, :role=>2, :login=>"me", :id=>1}}
>>
now... it says that employees is nil... but it shouldn't be... it should have 3 hashes ... =\
but also, what does {...} mean? it seams terribly ambiguous
Ruby is clever about recursive structures and will use "..." instead of looping indefinitely.
For example:
a = [1, 2]
a << a # a is now recursive, since it contains itself
a.to_s # => [1, 2, [...]]
a[2][2][2][2][2][2][2] == a # => true
In your case, the {...} refers to any of the hashes already in the process of being outputed.
Maybe what you meant to do was to insert a copy of a hash? In the simple array example:
a = [1, 2]
a << a.dup # a is not recursive
a.to_s # => [1, 2, [1, 2]]
What do you think is the most optimal way to retrieve all attributes for all the associations an AR model has?
i.e: let's say we have the model Target.
class Target < ActiveRecord::Base
has_many :countries
has_many :cities
has_many :towns
has_many :colleges
has_many :tags
accepts_nested_attributes_for :countries, :cities, ...
end
I'd like to retrieve all the association's attributes by calling a method on a Target instance:
target.associations_attributes
>> { :countries => { "1" => { :name => "United States", :code => "US", :id => 1 },
"2" => { :name => "Canada", :code => "CA", :id => 2 } },
:cities => { "1" => { :name => "New York", :region_id => 1, :id => 1 } },
:regions => { ... },
:colleges => { ... }, ....
}
Currently I make this work by iterating on each association, and then on each model of the association, But it's kind of expensive, How do you think I can optimize this?
Just a note: I realized you can't call target.countries_attributes on has_many associations with nested_attributes, one_to_one associations allow to call target.country_attributes
I'm not clear on what you mean with iterating on all associations. Are you already using reflections?
Still curious if there's a neater way, but this is what I could come up with, which more or less results in the hash you're showing in your example:
class Target < ActiveRecord::Base
has_many :tags
def associations_attributes
# Get a list of symbols of the association names in this class
association_names = self.class.reflect_on_all_associations.collect { |r| r.name }
# Fetch myself again, but include all associations
me = self.class.find self.id, :include => association_names
# Collect an array of pairs, which we can use to build the hash we want
pairs = association_names.collect do |association_name|
# Get the association object(s)
object_or_array = me.send(association_name)
# Build the single pair for this association
if object_or_array.is_a? Array
# If this is a has_many or the like, use the same array-of-pairs trick
# to build a hash of "id => attributes"
association_pairs = object_or_array.collect { |o| [o.id, o.attributes] }
[association_name, Hash[*association_pairs.flatten(1)]]
else
# has_one, belongs_to, etc.
[association_name, object_or_array.attributes]
end
end
# Build the final hash
Hash[*pairs.flatten(1)]
end
end
And here's an irb session through script/console to show how it works. First, some environment:
>> t = Target.create! :name => 'foobar'
=> #<Target id: 1, name: "foobar">
>> t.tags.create! :name => 'blueish'
=> #<Tag id: 1, name: "blueish", target_id: 1>
>> t.tags.create! :name => 'friendly'
=> #<Tag id: 2, name: "friendly", target_id: 1>
>> t.tags
=> [#<Tag id: 1, name: "blueish", target_id: 1>, #<Tag id: 2, name: "friendly", target_id: 1>]
And here's the output from the new method:
>> t.associations_attributes
=> {:tags=>{1=>{"id"=>1, "name"=>"blueish", "target_id"=>1}, 2=>{"id"=>2, "name"=>"friendly", "target_id"=>1}}}
try this with exception handling:
class Target < ActiveRecord::Base
def associations_attributes
tmp = {}
self.class.reflections.symbolize_keys.keys.each do |key|
begin
data = self.send(key) || {}
if data.is_a?(ActiveRecord::Base)
tmp[key] = data.attributes.symbolize_keys!
else
mapped_data = data.map { |item| item.attributes.symbolize_keys! }
tmp[key] = mapped_data.each_with_index.to_h.invert
end
rescue Exception => e
tmp[key] = e.message
end
end
tmp
end
end
This is updated version of Stéphan Kochen's code for Rails 4.2
def associations_attributes
association_names = self.class.reflect_on_all_associations.collect { |r| r.name }
me = self.class.includes(association_names).find self.id
pairs = association_names.collect do |association_name|
object_or_array = me.send(association_name)
if object_or_array.is_a? ActiveRecord::Associations::CollectionProxy
association_pairs = object_or_array.collect { |o| [o.id, o.attributes] }
[association_name, Hash[*association_pairs.flatten(1)]]
else
[association_name, object_or_array.attributes]
end
end
Hash[*pairs.flatten(1)]
end