An example implementation of how to get and store metrics for Decidim

metrics.rb

module Decidim
  class OrganizationComponents < Rectify::Query
    def self.for(organization)
      new(organization).query
    end

    def initialize(organization)
      @organization = organization
    end

    def query
      Component.where(participatory_space: participatory_spaces).published
    end

    def participatory_spaces
      @participatory_spaces ||= Decidim.participatory_space_manifests.flat_map do |manifest|
        manifest.participatory_spaces.call(@organization).public_spaces
      end
    end
  end
end

# Given an organization
organization_proposals = Decidim::Proposals::Proposal.where(component: Decidim::OrganizationComponents.for(organization))
organization_proposals = organization_proposals.published

Decidim::Metric.create!(
  metricable: organization,
  name: "organization_proposals",
  value: organization_proposals.count
)


# Given a participatory space and a category
space_proposals = Decidim::Proposals::Proposal.where(component: Decidim::Component.where(participatory_space: space).published).published
proposals_by_category = space_proposals.joins(:category).where(decidim_categories: {id: category.id})

Decidim::Metric.create!(
  metricable: space,
  name: "proposals_by_category",
  value: proposals_by_category.count,
  metadata: {
    decidim_category_id: category.id,
    category_name: category.name
  }
)