Fix SQL error in admin measures API (mastodon#30753)

app/lib/admin/metrics/measure/query_helper.rb

@@ -18,7 +18,7 @@ def sanitized_sql_string
   def generated_series_days
     Arel.sql(
       <<~SQL.squish
-        SELECT generate_series(timestamp :start_at, :end_at, '1 day')::date AS period
+        SELECT generate_series(:start_at::timestamp, :end_at::timestamp, '1 day')::date AS period
       SQL
     )
   end

spec/requests/api/v1/admin/measures_spec.rb

@@ -7,11 +7,28 @@
   let(:token)   { Fabricate(:accessible_access_token, resource_owner_id: user.id, scopes: scopes) }
   let(:headers) { { 'Authorization' => "Bearer #{token.token}" } }
   let(:account) { Fabricate(:account) }
+  let(:params) do
+    {
+      keys: %w(instance_accounts instance_follows instance_followers),
+      instance_accounts: {
+        domain: 'mastodon.social',
+        include_subdomains: true,
+      },
+      instance_follows: {
+        domain: 'mastodon.social',
+        include_subdomains: true,
+      },
+      instance_followers: {
+        domain: 'mastodon.social',
+        include_subdomains: true,
+      },
+    }
+  end
 
   describe 'GET /api/v1/admin/measures' do
     context 'when not authorized' do
       it 'returns http forbidden' do
-        post '/api/v1/admin/measures', params: { account_id: account.id, limit: 2 }
+        post '/api/v1/admin/measures', params: params
 
         expect(response)
           .to have_http_status(403)
@@ -22,7 +39,7 @@
       let(:scopes) { 'admin:read' }
 
       it 'returns http success and status json' do
-        post '/api/v1/admin/measures', params: { account_id: account.id, limit: 2 }, headers: headers
+        post '/api/v1/admin/measures', params: params, headers: headers
 
         expect(response)
           .to have_http_status(200)