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# frozen_string_literal: true
# rubocop:todo all
require 'spec_helper'
describe 'aggregation examples in Ruby' do
before(:all) do
# In sharded clusters we need to ensure the database exists before running
# the tests in this file.
begin
ClientRegistry.instance.global_client('authorized')['_placeholder'].create
rescue Mongo::Error::OperationFailure::Family => e
# Collection already exists
if e.code != 48
raise
end
end
end
let(:client) do
authorized_client
end
context 'Aggregation Example 1 - Simple aggregation' do
let(:example_code) do
# Start Aggregation Example 1
client[:sales].aggregate(
[
{ '$match' => { 'items.fruit' => 'banana' } },
{ '$sort' => { 'date' => 1 } }
])
# End Aggregation Example 1
end
it 'successfully executes the aggregation' do
example_code.to_a
end
end
context 'Aggregation Example 2 - $match, $group, $project, $unwind, $sum, $sort, $dayOfWeek' do
let(:example_code) do
# Start Aggregation Example 2
client[:sales].aggregate(
[
{ '$unwind' => '$items' },
{ '$match' => { 'items.fruit' => 'banana' } },
{ '$group' => {
'_id' => { 'day' => { '$dayOfWeek' => '$date' } },
'count' => { '$sum' => '$items.quantity' } }
},
{ '$project' => {
'dayOfWeek' => '$_id.day',
'numberSold' => '$count',
'_id' => 0 }
},
{ '$sort' => { 'numberSold' => 1 } }
])
# End Aggregation Example 2
end
it 'successfully executes the aggregation' do
example_code.to_a
end
end
context 'Aggregation Example 3 - $unwind, $group, $sum, $dayOfWeek, $multiply, $project, $cond' do
let(:example_code) do
# Start Aggregation Example 3
client[:sales].aggregate(
[
{ '$unwind' => '$items' },
{ '$group' => {
'_id' => { 'day' => { '$dayOfWeek' => '$date' } },
'items_sold' => { '$sum' => '$items.quantity' },
'revenue' => { '$sum' => { '$multiply' => [ '$items.quantity', '$items.price' ] } } }
},
{ '$project' => { 'day' => '$_id.day',
'revenue' => 1,
'items_sold' => 1,
'discount' => {
'$cond' => { 'if' => { '$lte' => ['$revenue', 250]},
'then' => 25, 'else' => 0 } } }
}
])
# End Aggregation Example 3
end
it 'successfully executes the aggregation' do
example_code.to_a
end
end
context 'Aggregation Example 4 - $lookup, $filter, $match' do
min_server_fcv '3.6'
let(:example_code) do
# Start Aggregation Example 4
client[:sales].aggregate(
[
{ '$lookup' => {
'from' => 'air_airlines',
'let' => { 'constituents' => '$airlines' },
'pipeline' => [ { '$match' => { '$expr' =>
{ '$in' => ['$name', '$$constituents'] } } }],
'as' => 'airlines' }
},
{ '$project' => { '_id' => 0,
'name' => 1,
'airlines' => {
'$filter' => { 'input' => '$airlines',
'as' => 'airline',
'cond' => { '$eq' => ['$$airline.country', 'Canada'] } } } }
}
])
# End Aggregation Example 4
end
it 'successfully executes the aggregation' do
example_code.to_a
end
end
context 'runCommand Example 1' do
let(:example_code) do
# Start runCommand Example 1
client.database.command(buildInfo: 1)
# End runCommand Example 1
end
it 'successfully executes the command' do
example_code
end
end
context 'runCommand Example 2' do
before do
client[:restaurants].drop
client[:restaurants].create
end
let(:example_code) do
# Start runCommand Example 2
client.database.command(dbStats: 1)
# End runCommand Example 2
end
it 'successfully executes the command' do
example_code
end
end
context 'Index Example 1 - build simple ascending index' do
let(:example_code) do
# Start Index Example 1
client[:records].indexes.create_one(score: 1)
# End Index Example 1
end
it 'successfully executes the command' do
example_code
end
end
context 'Index Example 2 - build multikey index with partial filter expression' do
let(:example_code) do
# Start Index Example 2
client[:records].indexes.create_one({ cuisine: 1, name: 1 },
{ partialFilterExpression: { rating: { '$gt' => 5 } } })
# End Index Example 2
end
it 'successfully executes the command' do
example_code
end
end
end
|
