Improve the performance of the GET /:sources/:id/{access_requests,members} API endpoints
The performance was greatly improved by removing two N+1 queries issues for each endpoint. For comparison: 1. `GET /projects/:id/members` With two N+1 queries issues (one was already fxed in the following snippet): ``` ProjectMember Load (0.2ms) SELECT "members".* FROM "members" WHERE "members"."source_type" = $1 AND "members"."type" IN ('ProjectMember') AND "members"."source_id" = $2 AND "members"."source_type" = $3 AND "members"."type" IN ('ProjectMember') AND "members"."requested_at" IS NULL ORDER BY "members"."id" DESC [["source_type", "Project"], ["source_id", 1], ["source_type", "Project"]] User Load (0.5ms) SELECT "users".* FROM "users" WHERE "users"."id" IN (5, 22, 16, 13) ORDER BY "users"."id" DESC ActiveRecord::SchemaMigration Load (0.2ms) SELECT "schema_migrations".* FROM "schema_migrations" ProjectMember Load (0.3ms) SELECT "members".* FROM "members" WHERE "members"."source_type" = $1 AND "members"."type" IN ('ProjectMember') AND "members"."source_id" = $2 AND "members"."source_type" = $3 AND "members"."type" IN ('ProjectMember') AND "members"."requested_at" IS NULL AND "members"."user_id" = $4 ORDER BY "members"."id" DESC LIMIT 1 [["source_type", "Project"], ["source_id", 1], ["source_type", "Project"], ["user_id", 5]] ProjectMember Load (0.3ms) SELECT "members".* FROM "members" WHERE "members"."source_type" = $1 AND "members"."type" IN ('ProjectMember') AND "members"."source_id" = $2 AND "members"."source_type" = $3 AND "members"."type" IN ('ProjectMember') AND "members"."requested_at" IS NULL AND "members"."user_id" = $4 ORDER BY "members"."id" DESC LIMIT 1 [["source_type", "Project"], ["source_id", 1], ["source_type", "Project"], ["user_id", 22]] ProjectMember Load (0.3ms) SELECT "members".* FROM "members" WHERE "members"."source_type" = $1 AND "members"."type" IN ('ProjectMember') AND "members"."source_id" = $2 AND "members"."source_type" = $3 AND "members"."type" IN ('ProjectMember') AND "members"."requested_at" IS NULL AND "members"."user_id" = $4 ORDER BY "members"."id" DESC LIMIT 1 [["source_type", "Project"], ["source_id", 1], ["source_type", "Project"], ["user_id", 16]] ProjectMember Load (0.3ms) SELECT "members".* FROM "members" WHERE "members"."source_type" = $1 AND "members"."type" IN ('ProjectMember') AND "members"."source_id" = $2 AND "members"."source_type" = $3 AND "members"."type" IN ('ProjectMember') AND "members"."requested_at" IS NULL AND "members"."user_id" = $4 ORDER BY "members"."id" DESC LIMIT 1 [["source_type", "Project"], ["source_id", 1], ["source_type", "Project"], ["user_id", 13]] ``` Without the N+1 queries issues: ``` ProjectMember Load (0.3ms) SELECT "members".* FROM "members" WHERE "members"."source_type" = $1 AND "members"."type" IN ('ProjectMember') AND "members"."source_id" = $2 AND "members"."source_type" = $3 AND "members"."type" IN ('ProjectMember') AND "members"."requested_at" IS NULL ORDER BY "members"."id" DESC LIMIT 20 OFFSET 0 [["source_type", "Project"], ["source_id", 1], ["source_type", "Project"]] User Load (0.5ms) SELECT "users".* FROM "users" WHERE "users"."id" IN (5, 22, 16, 13) ORDER BY "users"."id" DESC ``` 2. `GET /projects/:id/access_requests` With two N+1 queries issues: ``` ProjectMember Load (0.3ms) SELECT "members".* FROM "members" WHERE "members"."source_type" = $1 AND "members"."type" IN ('ProjectMember') AND "members"."source_id" = $2 AND "members"."source_type" = $3 AND "members"."type" IN ('ProjectMember') AND ("members"."requested_at" IS NOT NULL) ORDER BY "members"."id" DESC [["source_type", "Project"], ["source_id", 8], ["source_type", "Project"]] User Load (0.1ms) SELECT "users".* FROM "users" WHERE "users"."id" = $1 ORDER BY "users"."id" DESC LIMIT 1 [["id", 24]] User Load (0.1ms) SELECT "users".* FROM "users" WHERE "users"."id" = $1 ORDER BY "users"."id" DESC LIMIT 1 [["id", 23]] ActiveRecord::SchemaMigration Load (0.2ms) SELECT "schema_migrations".* FROM "schema_migrations" ProjectMember Load (0.1ms) SELECT "members".* FROM "members" WHERE "members"."source_type" = $1 AND "members"."type" IN ('ProjectMember') AND "members"."source_id" = $2 AND "members"."source_type" = $3 AND "members"."type" IN ('ProjectMember') AND ("members"."requested_at" IS NOT NULL) AND "members"."user_id" = $4 ORDER BY "members"."id" DESC LIMIT 1 [["source_type", "Project"], ["source_id", 8], ["source_type", "Project"], ["user_id", 24]] ProjectMember Load (0.2ms) SELECT "members".* FROM "members" WHERE "members"."source_type" = $1 AND "members"."type" IN ('ProjectMember') AND "members"."source_id" = $2 AND "members"."source_type" = $3 AND "members"."type" IN ('ProjectMember') AND ("members"."requested_at" IS NOT NULL) AND "members"."user_id" = $4 ORDER BY "members"."id" DESC LIMIT 1 [["source_type", "Project"], ["source_id", 8], ["source_type", "Project"], ["user_id", 23]] ``` Without the N+1 queries issues: ``` ProjectMember Load (0.3ms) SELECT "members".* FROM "members" WHERE "members"."source_type" = $1 AND "members"."type" IN ('ProjectMember') AND "members"."source_id" = $2 AND "members"."source_type" = $3 AND "members"."type" IN ('ProjectMember') AND ("members"."requested_at" IS NOT NULL) ORDER BY "members"."id" DESC LIMIT 20 OFFSET 0 [["source_type", "Project"], ["source_id", 8], ["source_type", "Project"]] User Load (0.5ms) SELECT "users".* FROM "users" WHERE "users"."id" IN (24, 23) ORDER BY "users"."id" DESC ``` Signed-off-by: Rémy Coutable <remy@rymai.me>
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5010be7766
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@ -18,10 +18,9 @@ module API
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source = find_source(source_type, params[:id])
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authorize_admin_source!(source_type, source)
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access_requesters = source.requesters
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users = Kaminari.paginate_array(access_requesters.map(&:user))
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access_requesters = paginate(source.requesters.includes(:user))
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present paginate(users), with: Entities::AccessRequester, source: source
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present access_requesters.map(&:user), with: Entities::AccessRequester, access_requesters: access_requesters
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end
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# Request access to the group/project
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@ -93,14 +93,14 @@ module API
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class Member < UserBasic
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expose :access_level do |user, options|
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member = options[:member] || options[:source].members.find_by(user_id: user.id)
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member = options[:member] || options[:members].find { |m| m.user_id == user.id }
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member.access_level
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end
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end
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class AccessRequester < UserBasic
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expose :requested_at do |user, options|
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access_requester = options[:access_requester] || options[:source].requesters.find_by(user_id: user.id)
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access_requester = options[:access_requester] || options[:access_requesters].find { |m| m.user_id == user.id }
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access_requester.requested_at
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end
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end
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@ -18,11 +18,11 @@ module API
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get ":id/members" do
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source = find_source(source_type, params[:id])
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members = source.members
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members = source.members.includes(:user)
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members = members.joins(:user).merge(User.search(params[:query])) if params[:query]
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users = Kaminari.paginate_array(members.map(&:user))
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members = paginate(members)
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present paginate(users), with: Entities::Member, source: source
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present members.map(&:user), with: Entities::Member, members: members
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end
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# Get a group/project member
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