fix(Linear Node): Fix issue with single item not being returned (#5193)

packages/nodes-base/credentials/LinearApi.credentials.ts

@@ -1,4 +1,4 @@
-import { ICredentialType, INodeProperties } from 'n8n-workflow';
+import { IAuthenticateGeneric, ICredentialType, INodeProperties } from 'n8n-workflow';
 
 export class LinearApi implements ICredentialType {
 	name = 'linearApi';
@@ -16,4 +16,13 @@ export class LinearApi implements ICredentialType {
 			default: '',
 		},
 	];
+
+	authenticate: IAuthenticateGeneric = {
+		type: 'generic',
+		properties: {
+			headers: {
+				Authorization: '={{$credentials.apiKey}}',
+			},
+		},
+	};
 }

packages/nodes-base/nodes/Linear/GenericFunctions.ts

@@ -22,14 +22,11 @@ export async function linearApiRequest(
 	body: any = {},
 	option: IDataObject = {},
 ): Promise<any> {
-	const credentials = await this.getCredentials('linearApi');
-
 	const endpoint = 'https://api.linear.app/graphql';
 
 	let options: OptionsWithUri = {
 		headers: {
 			'Content-Type': 'application/json',
-			Authorization: credentials.apiKey,
 		},
 		method: 'POST',
 		body,
@@ -38,7 +35,7 @@ export async function linearApiRequest(
 	};
 	options = Object.assign({}, options, option);
 	try {
-		return await this.helpers.request(options);
+		return await this.helpers.requestWithAuthentication.call(this, 'linearApi', options);
 	} catch (error) {
 		throw new NodeApiError(this.getNode(), error as JsonObject);
 	}

packages/nodes-base/nodes/Linear/Linear.node.ts

@@ -202,7 +202,7 @@ export class Linear implements INodeType {
 						};
 
 						responseData = await linearApiRequest.call(this, body);
-						responseData = responseData.data?.issues?.nodes[0];
+						responseData = responseData.data.issue;
 					}
 					if (operation === 'getAll') {
 						const returnAll = this.getNodeParameter('returnAll', i);

packages/nodes-base/nodes/Linear/Queries.ts

@@ -93,17 +93,14 @@ export const query = {
 				}`;
 	},
 	getIssue() {
-		return `query Issue ($issueId: ID){
+		return `query Issue($issueId: String!) {
-			issues(filter: { 
+			issue(id: $issueId) {
-				id: { eq: $issueId }
-			}) {
-				nodes {
 				id,
 				title,
-					priority
+				priority,
-					archivedAt
+				archivedAt,
 				assignee {
-						id
+					id,
 					displayName
 				}
 				state {
@@ -122,7 +119,6 @@ export const query = {
 					name
 				}
 			}
-			}
 		}`;
 	},
 	getIssues() {