I have this ActiveRecord sum:
#websites = current_user.records.sum(:minutes, :group =>'website', :conditions => "website IS NOT NULL")
I would like to limit it to the 10 highest minute sums. Could someone let me know the syntax for that?
Thanks in advance.
You can :order by the summed column and then :limit it to 10 rows like this:
#websites = current_user.records.sum(:minutes,
:group => 'website',
:conditions => 'website IS NOT NULL',
:order => 'SUM(minutes) DESC',
:limit => 10)
Just add a :limit, like so:
current_user.records.sum(:minutes, :group => '', :conditions => '', :limit => num)
Related
I have the code like following
Listing.search(
Riddle::Query.escape(params[:search]),
:include => params[:include],
:page => page,
:per_page => per_page,
:star => true,
:with => with,
:with_all => with_all,
:order => params[:sort]
)
params[:include] contains the value like [:listing_images, :author, :category, :origin_loc]
I don’t know what was wrong here.
I'm building a site for users to post events they wish to sell tickets for.
I'm writing a query where the conditions are the follow:
active equals true
sales_stop is < Time.now
The problem I am having is coming up with a condition which tests whether or not a record's sales_stop time is less than Time.now.
Below is what I have as of now:
#events = Event.paginate :page => params[:page],
:conditions => {:active => true},
:order => "created_at DESC"
In turn, I've been toying around with the sales_stop condition with no luck.
I've been trying something like this:
#events = Event.paginate :page => params[:page],
:conditions => {:active => true, :sales_stop < Time.now},
:order => "created_at DESC"
This of course doesn't work.
Does anyone know how I can set this query up so that I only retrieve records where the sales_stop attribute is less than Time.now?
Thank you.
Use the alternate syntax for :conditions, which uses a bind-style:
#events = Event.paginate :page => params[:page],
:conditions => ['active = ? AND sales_stop < ?', true, Time.now],
:order => "created_at DESC"
This should work:
#events = Event.paginate :page => params[:page],
:conditions => ['active=? AND sales_stop < ?', true, Time.now],
:order => "created_at DESC"
Just a different syntax.
Using ROR 2.3.8
I have this in cities_controller.rb:
#shops = Shop.published.search params[:keyword], {
:conditions => conditions,
:star => true,
:group_by => 'city_id',
:group_function => :attr,
:page => params[:page]
}.merge(:order => 'rating_average DESC')
#cities = #shops.collect { |shop| shopy.city }
How can I tell Rails to get the rating_average from City model instead of Shop model? Because the Shop model does not have rating_average. It's actually City model that gets rated.
Thank you.
UPDATES
published namescope in Shop.rb
sphinx_scope(:published) {
{:conditions => {:status => 'published'}}
}
Indexes in Shop.rb
define_index do
indexes city.name, :as => :name, :sortable => true
indexes city.duration, :as => :duration
indexes city.status, :as => :status
#has city.budget, :as => :budget
#has city(:created_at), :as => :created_at
has city(:rating_average), :as => :rating_average
has city_id
end
UPDATES 2
class City < ActiveRecord::Base
has_many :shops, :dependent => :destroy
...
end
You should use joins to acheive this:
#shops = Shop.published.search params[:keyword], {
:conditions => conditions,
:star => true,
:group_by => :city_id,
:group_function => :attr,
:page => params[:page]
}.merge(:order => :rating_average,
:sort_mode => :desc)
You should also add cities. or shops. before columns to specify which table's column.
How do you effectively search among many fields in a model?
# user.rb model
def self.search(search, page)
paginate :per_page => 20, :page => page,
:conditions =>
['name like ? OR notes like ? OR code like ? OR city like ? OR state like ?,
"%#{search}%","%#{search}%","%#{search}%","%#{search}%","%#{search}%"
], :order => 'name'
This code is horrible for any more than a few fields, and it doesn't return a result if, for instance word #1 comes from :name and word #2 comes from :code. Is there a more elegant way?
I think that do work
def self.search(search, page)
fields = [:name, :notes, :code, :city, :state]
paginate :per_page => 20, :page => page,
:conditions => [fields.map{|f| "#{f} like ?"}.join(' OR '),
*fields.map{|f| "%#{search}%"}], :order => 'name'
You can use searchlogic
def self.search(search, page)
search_cond = resource.search(name_or_notes_or_code_or_city_or_state_like => search.to_s)
search_cond.all
end
Hope you got the idea
def self.search(search, page)
fields = %w(name notes code city state)
paginate :per_page => 20, :page => page,
:conditions => [fields.map{|f| "#{f} like :phrase"}.join(' OR '), {:phrase => search}],
:order => 'name'
I'm encountering a problem with will_paginate while doing a complex find.
:photo has_many :tags, :through => :tagships
:item has_many :photos
:photo belongs_to :item
#photos = #item.photos.paginate :page => params[:page],
:per_page => 200,
:conditions => [ 'tags.id IN (?)', tag_ids],
:order => 'created_at DESC',
:joins => :tags,
:group => "photos.id HAVING COUNT(DISTINCT tags.id) = #{tag_count}"
I want to fetch all the photos who have all the tags in the tag_ids array. MySQL's IN usually does "or" searches, but I need "and". I found how to modify IN to mimic "and" behavior here and it works fine when using model.find(), also works as long as the number of records fetched is lower than my :per_page count. But if it has to paginated, the SQL that is generated is similar to:
SELECT count(*) AS count_all, photos.id HAVING COUNT(DISTINCT tags.id) = 1 AS photos_id_having_count_distinct_tags_id_1 FROM `photos`(...)
which doesn't work. Other have seen this bug and were able to move their count() out of the query, but I don't think that's possible in my case.
Is there a better way to do this search that might work with will_paginate? If its the only way to do this, I guess I should look into another pagination plugin?
Thanks!
FYI, here's what I finally found to fix this:
#photos = WillPaginate::Collection.create(current_page, per_page) do |pager|
result = #item.photos.find :all, :conditions => [ 'tags.id IN (?)', tag_ids] ,:order => 'created_at DESC', :joins => :tags, :group => "photos.id HAVING COUNT(DISTINCT tags.id) = #{#tags.count}", :limit => pager.per_page, :offset => pager.offset
pager.replace(result)
unless pager.total_entries
pager.total_entries = #item.photos.find(:all, :conditions => [ 'tags.id IN (?)', tag_ids] ,:order => 'created_at DESC', :joins => :tags, :group => "photos.id HAVING COUNT(DISTINCT tags.id) = #{#tags.count}").count
end
end
You have to manually construct the paginated set using the page number as an offset and using the tags to make a join query. Kinda clunky.
My first stab at this (sorry don't have time to test it right now... will update if I do) would be something like the following (added the :select and changed the :group):
#photos = #item.photos.paginate :page => params[:page],
:per_page => 200,
:select => "photos.*, COUNT(DISTINCT tags.id) AS tag_count",
:conditions => [ 'tags.id IN (?)', tag_ids ],
:order => 'created_at DESC',
:joins => :tags,
:group => "photos.id HAVING tag_count = #{tag_count}"