only return last_commit_sha in the JSON

app/assets/javascripts/ide/stores/mutations/file.js

@@ -47,7 +47,7 @@ export default {
       baseRaw: null,
       html: data.html,
       size: data.size,
-      lastCommit: data.last_commit,
+      lastCommitSha: data.last_commit_sha,
     });
   },
   [types.SET_FILE_RAW_DATA](state, { file, raw }) {

app/assets/javascripts/ide/stores/utils.js

@@ -17,6 +17,7 @@ export const dataStructure = () => ({
   changed: false,
   staged: false,
   lastCommitPath: '',
+  lastCommitSha: '',
   lastCommit: {
     id: '',
     url: '',
@@ -112,7 +113,7 @@ export const createCommitPayload = ({ branch, newBranch, state, rootState }) =>
     file_path: f.path,
     content: f.content,
     encoding: f.base64 ? 'base64' : 'text',
-    last_commit_id: newBranch ? undefined : f.lastCommit.id,
+    last_commit_id: newBranch ? undefined : f.lastCommitSha,
   })),
   start_branch: newBranch ? rootState.currentBranchId : undefined,
 });

app/controllers/projects/blob_controller.rb

@@ -197,13 +197,14 @@ class Projects::BlobController < Projects::ApplicationController
   end
 
   def show_json
+    set_last_commit_sha
     path_segments = @path.split('/')
     path_segments.pop
     tree_path = path_segments.join('/')
-    last_commit = @repository.last_commit_for_path(@commit.id, @blob.path)
 
     json = {
       id: @blob.id,
+      last_commit_sha: @last_commit_sha,
       path: blob.path,
       name: blob.name,
       extension: blob.extension,
@@ -218,7 +219,6 @@ class Projects::BlobController < Projects::ApplicationController
       blame_path: project_blame_path(project, @id),
       commits_path: project_commits_path(project, @id),
       tree_path: project_tree_path(project, File.join(@ref, tree_path)),
-      last_commit: last_commit,
       permalink: project_blob_path(project, File.join(@commit.id, @path))
     }
 

spec/javascripts/ide/stores/modules/commit/actions_spec.js

@@ -243,9 +243,7 @@ describe('IDE commit module actions', () => {
         ...file('changed'),
         type: 'blob',
         active: true,
-        lastCommit: {
-          id: '123456789',
-        },
+        lastCommitSha: '123456789',
       };
       store.state.stagedFiles.push(f);
       store.state.changedFiles = [

spec/javascripts/ide/stores/utils_spec.js

@@ -76,9 +76,7 @@ describe('Multi-file store utils', () => {
             ...file('staged'),
             path: 'staged',
             content: 'updated file content',
-            lastCommit: {
-              id: '123456789',
-            },
+            lastCommitSha: '123456789',
           },
           {
             ...file('newFile'),
@@ -86,9 +84,7 @@ describe('Multi-file store utils', () => {
             tempFile: true,
             content: 'new file content',
             base64: true,
-            lastCommit: {
-              id: '123456789',
-            },
+            lastCommitSha: '123456789',
           },
         ],
         currentBranchId: 'master',