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\`GET /platform/api/v1/agent_bots\` returns 500 when any \`AgentBot\` that was previously registered with a Platform App has since been deleted. The bug was introduced by a missing \`dependent: :destroy\` on the \`AgentBot\` model — deleting a bot left orphaned rows in \`platform_app_permissibles\`, which the index action later iterated over and crashed rendering with a \`NoMethodError\` on \`nil\`. Closes #13407 ## Root cause The index action loads all \`platform_app_permissibles\` for the platform app and passes each \`resource.permissible\` (the associated \`AgentBot\`) to a Jbuilder partial. When the \`AgentBot\` no longer exists, \`resource.permissible\` returns \`nil\` and the partial crashes calling \`.id\`, \`.name\`, etc. on it. Every other \`AgentBot\` association (\`agent_bot_inboxes\`, \`messages\`, \`assigned_conversations\`) had a \`dependent:\` option — \`platform_app_permissibles\` was the only one missing it. There was also an N+1 query: the index fired a separate SQL query per permissible to load each bot. ## What changed **1. Model — prevent orphans at deletion time** \`\`\`ruby has_many :platform_app_permissibles, as: :permissible, dependent: :destroy \`\`\` **2. Controller — eager-load to eliminate N+1** \`\`\`ruby @resources = @platform_app.platform_app_permissibles .where(permissible_type: 'AgentBot') .includes(:permissible) \`\`\` **3. Jbuilder — defensive nil guard for pre-existing orphans** \`\`\`ruby bot = resource.permissible next if bot.nil? json.partial! '...', resource: bot \`\`\` ## Trade-offs considered | Option | Decision | |---|---| | Rescue \`NoMethodError\` in jbuilder | Hides the failure rather than fixing it. Rejected. | | Only add the nil guard, skip the model fix | Leaves the data integrity gap open — future deletions continue creating orphans. Rejected. | | Both layers (chosen) | Model fix prevents new orphans; nil guard is defence-in-depth for any orphans that survived before deployment. | | \`dependent: :nullify\` | Doesn't apply — a nullified permissible would still cause the same nil dereference. Rejected. | ## How to reproduce 1. Create an AgentBot via the Platform API 2. Delete the AgentBot via any path (admin UI, API, or direct model call) 3. Call \`GET /platform/api/v1/agent_bots\` with a Platform App token 4. Observe 500 After this fix, the endpoint returns 200 with an empty array. Co-authored-by: Ramalau Debeila <rdebeila@datacentrix.co.za> |
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| .. | ||
| account_users_controller_spec.rb | ||
| accounts_controller_spec.rb | ||
| agent_bots_controller_spec.rb | ||
| email_channel_migrations_controller_spec.rb | ||
| users_controller_spec.rb | ||