Revert backend changes

- Revert changes in
gitlab.com/gitlab-org/gitlab/-/merge_requests/26171
- Type in iid arguments reverted to STRING_TYPE

app/graphql/mutations/merge_requests/base.rb

@@ -9,7 +9,7 @@ module Mutations
                required: true,
                description: "The project the merge request to mutate is in"
 
-      argument :iid, GraphQL::ID_TYPE,
+      argument :iid, GraphQL::STRING_TYPE,
                required: true,
                description: "The iid of the merge request to mutate"
 

app/graphql/resolvers/issues_resolver.rb

@@ -2,11 +2,11 @@
 
 module Resolvers
   class IssuesResolver < BaseResolver
-    argument :iid, GraphQL::ID_TYPE,
+    argument :iid, GraphQL::STRING_TYPE,
               required: false,
               description: 'IID of the issue. For example, "1"'
 
-    argument :iids, [GraphQL::ID_TYPE],
+    argument :iids, [GraphQL::STRING_TYPE],
               required: false,
               description: 'List of IIDs of issues. For example, [1, 2]'
     argument :state, Types::IssuableStateEnum,

app/graphql/resolvers/merge_requests_resolver.rb

@@ -2,11 +2,11 @@
 
 module Resolvers
   class MergeRequestsResolver < BaseResolver
-    argument :iid, GraphQL::ID_TYPE,
+    argument :iid, GraphQL::STRING_TYPE,
               required: false,
               description: 'The IID of the merge request, e.g., "1"'
 
-    argument :iids, [GraphQL::ID_TYPE],
+    argument :iids, [GraphQL::STRING_TYPE],
               required: false,
               description: 'The list of IIDs of issues, e.g., [1, 2]'
 

app/graphql/types/ci/pipeline_type.rb

@@ -11,7 +11,7 @@ module Types
 
       field :id, GraphQL::ID_TYPE, null: false,
             description: 'ID of the pipeline'
-      field :iid, GraphQL::ID_TYPE, null: false,
+      field :iid, GraphQL::STRING_TYPE, null: false,
             description: 'Internal ID of the pipeline'
 
       field :sha, GraphQL::STRING_TYPE, null: false,

app/graphql/types/merge_request_type.rb

@@ -14,7 +14,7 @@ module Types
 
     field :id, GraphQL::ID_TYPE, null: false,
           description: 'ID of the merge request'
-    field :iid, GraphQL::ID_TYPE, null: false,
+    field :iid, GraphQL::STRING_TYPE, null: false,
           description: 'Internal ID of the merge request'
     field :title, GraphQL::STRING_TYPE, null: false,
           description: 'Title of the merge request'

doc/api/graphql/reference/gitlab_schema.graphql

@@ -4150,7 +4150,7 @@ type MergeRequest implements Noteable {
   """
   Internal ID of the merge request
   """
-  iid: ID!
+  iid: String!
 
   """
   Commit SHA of the merge request if merge is in progress
@@ -4550,7 +4550,7 @@ input MergeRequestSetAssigneesInput {
   """
   The iid of the merge request to mutate
   """
-  iid: ID!
+  iid: String!
 
   """
   The operation to perform. Defaults to REPLACE.
@@ -4595,7 +4595,7 @@ input MergeRequestSetLabelsInput {
   """
   The iid of the merge request to mutate
   """
-  iid: ID!
+  iid: String!
 
   """
   The Label IDs to set. Replaces existing labels by default.
@@ -4645,7 +4645,7 @@ input MergeRequestSetLockedInput {
   """
   The iid of the merge request to mutate
   """
-  iid: ID!
+  iid: String!
 
   """
   Whether or not to lock the merge request.
@@ -4690,7 +4690,7 @@ input MergeRequestSetMilestoneInput {
   """
   The iid of the merge request to mutate
   """
-  iid: ID!
+  iid: String!
 
   """
   The milestone to assign to the merge request.
@@ -4735,7 +4735,7 @@ input MergeRequestSetSubscriptionInput {
   """
   The iid of the merge request to mutate
   """
-  iid: ID!
+  iid: String!
 
   """
   The project the merge request to mutate is in
@@ -4780,7 +4780,7 @@ input MergeRequestSetWipInput {
   """
   The iid of the merge request to mutate
   """
-  iid: ID!
+  iid: String!
 
   """
   The project the merge request to mutate is in
@@ -5351,7 +5351,7 @@ type Pipeline {
   """
   Internal ID of the pipeline
   """
-  iid: ID!
+  iid: String!
 
   """
   SHA of the pipeline's commit
@@ -5629,12 +5629,12 @@ type Project {
     """
     IID of the issue. For example, "1"
     """
-    iid: ID
+    iid: String
 
     """
     List of IIDs of issues. For example, [1, 2]
     """
-    iids: [ID!]
+    iids: [String!]
 
     """
     Labels applied to this issue
@@ -5724,12 +5724,12 @@ type Project {
     """
     IID of the issue. For example, "1"
     """
-    iid: ID
+    iid: String
 
     """
     List of IIDs of issues. For example, [1, 2]
     """
-    iids: [ID!]
+    iids: [String!]
 
     """
     Labels applied to this issue
@@ -5799,12 +5799,12 @@ type Project {
     """
     The IID of the merge request, e.g., "1"
     """
-    iid: ID
+    iid: String
 
     """
     The list of IIDs of issues, e.g., [1, 2]
     """
-    iids: [ID!]
+    iids: [String!]
   ): MergeRequest
 
   """
@@ -5829,12 +5829,12 @@ type Project {
     """
     The IID of the merge request, e.g., "1"
     """
-    iid: ID
+    iid: String
 
     """
     The list of IIDs of issues, e.g., [1, 2]
     """
-    iids: [ID!]
+    iids: [String!]
 
     """
     Returns the last _n_ elements from the list.

doc/api/graphql/reference/gitlab_schema.json

@@ -11861,7 +11861,7 @@
                 "name": null,
                 "ofType": {
                   "kind": "SCALAR",
-                  "name": "ID",
+                  "name": "String",
                   "ofType": null
                 }
               },
@@ -13024,7 +13024,7 @@
                 "name": null,
                 "ofType": {
                   "kind": "SCALAR",
-                  "name": "ID",
+                  "name": "String",
                   "ofType": null
                 }
               },
@@ -13172,7 +13172,7 @@
                 "name": null,
                 "ofType": {
                   "kind": "SCALAR",
-                  "name": "ID",
+                  "name": "String",
                   "ofType": null
                 }
               },
@@ -13320,7 +13320,7 @@
                 "name": null,
                 "ofType": {
                   "kind": "SCALAR",
-                  "name": "ID",
+                  "name": "String",
                   "ofType": null
                 }
               },
@@ -13450,7 +13450,7 @@
                 "name": null,
                 "ofType": {
                   "kind": "SCALAR",
-                  "name": "ID",
+                  "name": "String",
                   "ofType": null
                 }
               },
@@ -13576,7 +13576,7 @@
                 "name": null,
                 "ofType": {
                   "kind": "SCALAR",
-                  "name": "ID",
+                  "name": "String",
                   "ofType": null
                 }
               },
@@ -13706,7 +13706,7 @@
                 "name": null,
                 "ofType": {
                   "kind": "SCALAR",
-                  "name": "ID",
+                  "name": "String",
                   "ofType": null
                 }
               },
@@ -16283,7 +16283,7 @@
                 "name": null,
                 "ofType": {
                   "kind": "SCALAR",
-                  "name": "ID",
+                  "name": "String",
                   "ofType": null
                 }
               },
@@ -17021,7 +17021,7 @@
                   "description": "IID of the issue. For example, \"1\"",
                   "type": {
                     "kind": "SCALAR",
-                    "name": "ID",
+                    "name": "String",
                     "ofType": null
                   },
                   "defaultValue": null
@@ -17037,7 +17037,7 @@
                       "name": null,
                       "ofType": {
                         "kind": "SCALAR",
-                        "name": "ID",
+                        "name": "String",
                         "ofType": null
                       }
                     }
@@ -17200,7 +17200,7 @@
                   "description": "IID of the issue. For example, \"1\"",
                   "type": {
                     "kind": "SCALAR",
-                    "name": "ID",
+                    "name": "String",
                     "ofType": null
                   },
                   "defaultValue": null
@@ -17216,7 +17216,7 @@
                       "name": null,
                       "ofType": {
                         "kind": "SCALAR",
-                        "name": "ID",
+                        "name": "String",
                         "ofType": null
                       }
                     }
@@ -17475,7 +17475,7 @@
                   "description": "The IID of the merge request, e.g., \"1\"",
                   "type": {
                     "kind": "SCALAR",
-                    "name": "ID",
+                    "name": "String",
                     "ofType": null
                   },
                   "defaultValue": null
@@ -17491,7 +17491,7 @@
                       "name": null,
                       "ofType": {
                         "kind": "SCALAR",
-                        "name": "ID",
+                        "name": "String",
                         "ofType": null
                       }
                     }
@@ -17516,7 +17516,7 @@
                   "description": "The IID of the merge request, e.g., \"1\"",
                   "type": {
                     "kind": "SCALAR",
-                    "name": "ID",
+                    "name": "String",
                     "ofType": null
                   },
                   "defaultValue": null
@@ -17532,7 +17532,7 @@
                       "name": null,
                       "ofType": {
                         "kind": "SCALAR",
-                        "name": "ID",
+                        "name": "String",
                         "ofType": null
                       }
                     }