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Added Elasticsearch Rails extra (#96)
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,43 @@ | ||
| --- | ||
| title: Elasticsearch Rails | ||
| --- | ||
| # Elasticsearch Rails Extra | ||
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| Paginate `ElasticsearchRails::Results` objects efficiently avoiding expensive object-wrapping and without overriding. | ||
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| ## Synopsys | ||
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| See [extras](../extras.md) for general usage info. | ||
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| In a controller: | ||
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| ```ruby | ||
| def search | ||
| @pagy, @articles = pagy_elasticsearch_rails(Article.search(params[:q]).records, items: 10) | ||
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| render action: "index" | ||
| end | ||
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| # independently paginate some other collections as usual | ||
| @pagy_b, @records = pagy(some_scope, ...) | ||
| ``` | ||
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| ## Files | ||
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| This extra is composed of 1 file: | ||
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| - [elasticsearch_rails.rb](https://github.com/ddnexus/pagy/blob/master/lib/pagy/extras/elasticsearch_rails.rb) | ||
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| ## Methods | ||
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| This extra adds the `pagy_elasticsearch_rails` method to the `Pagy::Backend` to be used in place (or in parallel) of the `pagy` method when you have to paginate a `ElasticsearchRails::Results` object. It also adds a `pagy_elasticsearch_rails_get_variables` sub-method, used for easy customization of variables by overriding. | ||
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| **Notice**: there is no `pagy_elasticsearch_rails_get_items` method to override, since the items are fetched directly by Elasticsearch Rails. | ||
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| ### pagy_elasticsearch_rails(Model.search(...), vars=nil) | ||
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| This method is the same as the generic `pagy` method, but specialized for Elasticsearch Rails. (see the [pagy doc](../api/backend.md#pagycollection-varsnil)) | ||
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| ### pagy_elastic_search_rails_get_vars(array) | ||
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| This sub-method is the same as the `pagy_get_vars` sub-method, but it is called only by the `pagy_elasticsearch_rails` method. (see the [pagy_get_vars doc](../api/backend.md#pagy_get_varscollection-vars)). |
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,18 @@ | ||
| # See the Pagy documentation: https://ddnexus.github.io/pagy/extras/elasticsearch_rails | ||
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| class Pagy | ||
| # Add specialized backend methods to paginate ElasticsearchRails::Results | ||
| module Backend ; private | ||
| # Return Pagy object and items | ||
| def pagy_elasticsearch_rails(results, vars={}) | ||
| pagy = Pagy.new(pagy_elasticsearch_rails_get_vars(results, vars)) | ||
| return pagy, results.offset(pagy.offset).limit(pagy.items) | ||
| end | ||
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| def pagy_elasticsearch_rails_get_vars(results, vars) | ||
| # Return the merged variables to initialize the Pagy object | ||
| { count: results.total, | ||
| page: (params[:page] || 1)}.merge!(vars) | ||
| end | ||
| end | ||
| end |
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| require_relative '../../test_helper' | ||
| require 'pagy/extras/elasticsearch_rails' | ||
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| SingleCov.covered! | ||
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| describe Pagy::Backend do | ||
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| let(:backend) { TestController.new } | ||
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| class ElasticsearchRails | ||
| class Results | ||
| def initialize(params); @params = params; end | ||
| def total; 1000; end | ||
| def offset(value); self; end | ||
| def limit(value); 25; end | ||
| def page | ||
| @params[:page] || 1 | ||
| end | ||
| end | ||
| end | ||
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| describe "#pagy_elasticsearch_rails" do | ||
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| before do | ||
| @collection = ElasticsearchRails::Results.new(backend.params) | ||
| end | ||
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| it 'paginates with defaults' do | ||
| pagy, _items = backend.send(:pagy_elasticsearch_rails, @collection) | ||
| pagy.must_be_instance_of Pagy | ||
| pagy.count.must_equal 1000 | ||
| pagy.items.must_equal 20 # Pagy default | ||
| pagy.page.must_equal backend.params[:page] | ||
| end | ||
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| it 'paginates with vars' do | ||
| pagy, _items = backend.send(:pagy_elasticsearch_rails, @collection, link_extra: 'X') | ||
| pagy.must_be_instance_of Pagy | ||
| pagy.count.must_equal 1000 | ||
| pagy.items.must_equal 20 # Pagy default | ||
| pagy.vars[:link_extra].must_equal 'X' | ||
| end | ||
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| end | ||
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| describe "#pagy_elasticsearch_rails_get_vars" do | ||
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| before do | ||
| @collection = ElasticsearchRails::Results.new(backend.params) | ||
| end | ||
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| it 'gets defaults' do | ||
| vars = {} | ||
| merged = backend.send :pagy_elasticsearch_rails_get_vars, @collection, vars | ||
| merged.keys.must_include :count | ||
| merged.keys.must_include :page | ||
| merged[:count].must_equal 1000 | ||
| merged[:items].must_be_nil | ||
| merged[:page].must_equal 3 | ||
| end | ||
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| it 'gets vars' do | ||
| vars = { items: 25, link_extra: 'X' } | ||
| merged = backend.send :pagy_elasticsearch_rails_get_vars, @collection, vars | ||
| merged.keys.must_include :count | ||
| merged.keys.must_include :page | ||
| merged.keys.must_include :link_extra | ||
| merged[:count].must_equal 1000 | ||
| merged[:items].must_equal 25 | ||
| merged[:link_extra].must_equal 'X' | ||
| end | ||
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| end | ||
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| end |