fix(#2195): Fix declared method for hash params with overlapping names

CHANGELOG.md

@@ -6,7 +6,7 @@
 
 #### Fixes
 
-* Your contribution here.
+* [#2372](https://github.com/ruby-grape/grape/pull/2372): Fix `declared` method for hash params with overlapping names - [@jcagarcia](https://github.com/jcagarcia).
 
 ### 2.0.0 (2023/11/11)
 

lib/grape/dsl/inside_route.rb

@@ -99,7 +99,7 @@ def handle_passed_param(params_nested_path, has_passed_children = false, &_block
 
           route_options_params = options[:route_options][:params] || {}
           type = route_options_params.dig(key, :type)
-          has_children = route_options_params.keys.any? { |k| k != key && k.start_with?(key) }
+          has_children = route_options_params.keys.any? { |k| k != key && k.start_with?("#{key}[") }
 
           if type == 'Hash' && !has_children
             {}

spec/grape/endpoint/declared_spec.rb

@@ -39,6 +39,7 @@ def app
         optional :empty_arr, type: Array
         optional :empty_typed_arr, type: Array[String]
         optional :empty_hash, type: Hash
+        optional :empty_hash_two, type: Hash
         optional :empty_set, type: Set
         optional :empty_typed_set, type: Set[String]
       end
@@ -122,7 +123,7 @@ def app
       end
       get '/declared?first=present'
       expect(last_response.status).to eq(200)
-      expect(JSON.parse(last_response.body).keys.size).to eq(11)
+      expect(JSON.parse(last_response.body).keys.size).to eq(12)
     end
 
     it 'has a optional param with default value all the time' do
@@ -201,6 +202,7 @@ def app
 
         body = JSON.parse(last_response.body)
         expect(body['empty_hash']).to eq({})
+        expect(body['empty_hash_two']).to eq({})
         expect(body['nested']).to be_a(Hash)
         expect(body['nested']['empty_hash']).to eq({})
         expect(body['nested']['nested_two']).to be_a(Hash)