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work-summary/phases/phase-1.2-models-repositories-complete.md
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work-summary/phases/phase-1.2-models-repositories-complete.md
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# Phase 1.2: Models & Repositories Implementation - Complete
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**Date:** 2024
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**Status:** ✅ Complete
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**Phase:** Workflow Orchestration - Models & Repositories
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---
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## Overview
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Phase 1.2 successfully implemented all data models and repository layers for the workflow orchestration system. This provides the foundational database access layer needed for workflow execution.
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---
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## Completed Tasks
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### 1. Workflow Models Added to `common/src/models.rs`
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#### New Enum Types
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- `WorkflowTaskStatus` - Enum for workflow task status tracking (Pending, Running, Completed, Failed, Skipped, Cancelled)
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- **Note:** This enum was added but may not be needed if we use `ExecutionStatus` for tasks
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#### New Model Modules
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**`workflow` module** containing three core models:
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1. **`WorkflowDefinition`**
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- `id`, `ref`, `pack`, `pack_ref`, `label`, `description`, `version`
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- `param_schema`, `out_schema`, `definition` (JSONB)
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- `tags` (array), `enabled` (boolean)
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- `created`, `updated` timestamps
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2. **`WorkflowExecution`**
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- `id`, `execution` (parent execution ID), `workflow_def`
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- Task state arrays: `current_tasks`, `completed_tasks`, `failed_tasks`, `skipped_tasks`
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- `variables` (JSONB for workflow-scoped variables)
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- `task_graph` (JSONB for execution graph)
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- `status` (ExecutionStatus), `error_message`
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- `paused` (boolean), `pause_reason`
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- `created`, `updated` timestamps
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3. **`WorkflowTaskExecution`**
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- `id`, `workflow_execution`, `execution` (child execution ID)
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- `task_name`, `task_index`, `task_batch` (for with-items iterations)
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- `status` (ExecutionStatus), `started_at`, `completed_at`, `duration_ms`
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- `result`, `error` (JSONB)
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- `retry_count`, `max_retries`, `next_retry_at`
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- `timeout_seconds`, `timed_out`
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- `created`, `updated` timestamps
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#### Updated Existing Models
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**`Action` model** - Added workflow support:
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- `is_workflow: bool` - Flag indicating if action is a workflow
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- `workflow_def: Option<Id>` - Reference to workflow definition
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---
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### 2. Workflow Repository Created (`common/src/repositories/workflow.rs`)
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Comprehensive repository implementation with 875 lines of code implementing CRUD operations and specialized queries for all three workflow entities.
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#### WorkflowDefinitionRepository
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**Standard CRUD Operations:**
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- `FindById`, `FindByRef`, `List`, `Create`, `Update`, `Delete`
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**Specialized Queries:**
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- `find_by_pack(pack_id)` - Get all workflows for a pack
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- `find_enabled()` - Get all enabled workflows
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- `find_by_tag(tag)` - Search workflows by tag
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**Input Structs:**
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- `CreateWorkflowDefinitionInput` - All fields for creating a workflow
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- `UpdateWorkflowDefinitionInput` - Optional fields for updates
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#### WorkflowExecutionRepository
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**Standard CRUD Operations:**
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- `FindById`, `List`, `Create`, `Update`, `Delete`
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**Specialized Queries:**
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- `find_by_execution(execution_id)` - Get workflow by parent execution
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- `find_by_status(status)` - Get workflows by status
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- `find_paused()` - Get all paused workflows
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- `find_by_workflow_def(workflow_def_id)` - Get executions of a specific workflow
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**Input Structs:**
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- `CreateWorkflowExecutionInput` - Initial workflow execution state
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- `UpdateWorkflowExecutionInput` - Runtime state updates (task lists, variables, status, etc.)
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#### WorkflowTaskExecutionRepository
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**Standard CRUD Operations:**
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- `FindById`, `List`, `Create`, `Update`, `Delete`
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**Specialized Queries:**
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- `find_by_workflow_execution(workflow_execution_id)` - Get all tasks for a workflow
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- `find_by_task_name(workflow_execution_id, task_name)` - Get specific task instances
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- `find_pending_retries()` - Get tasks ready for retry
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- `find_timed_out()` - Get tasks that timed out
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- `find_by_execution(execution_id)` - Get task by child execution ID
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**Input Structs:**
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- `CreateWorkflowTaskExecutionInput` - Task execution initialization
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- `UpdateWorkflowTaskExecutionInput` - Task status and result updates
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---
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### 3. Action Repository Updates (`common/src/repositories/action.rs`)
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#### Updated All SELECT Queries
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- Added `is_workflow` and `workflow_def` columns to all queries
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- Ensures consistency across all action-related operations
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#### New Workflow-Specific Methods
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- `find_workflows()` - Get all actions that are workflows (is_workflow = true)
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- `find_by_workflow_def(workflow_def_id)` - Get action linked to a workflow definition
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- `link_workflow_def(action_id, workflow_def_id)` - Link an action to a workflow definition
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---
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### 4. Repository Module Updates (`common/src/repositories/mod.rs`)
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- Added `pub mod workflow;` declaration
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- Exported all three workflow repositories:
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- `WorkflowDefinitionRepository`
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- `WorkflowExecutionRepository`
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- `WorkflowTaskExecutionRepository`
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---
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## Technical Details
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### Database Schema Alignment
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All models precisely match the database schema created in Phase 1.1:
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- Column names, types, and nullability match exactly
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- Array types (TEXT[]) mapped to `Vec<String>`
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- JSONB types mapped to `JsonDict` (serde_json::Value)
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- BIGSERIAL primary keys mapped to `Id` (i64)
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- Timestamps use `DateTime<Utc>` from chrono
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### SQLx Integration
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- All models use `#[derive(FromRow)]` for automatic mapping
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- Queries use `sqlx::query_as` for type-safe result mapping
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- Enums use `#[sqlx(type_name = "...")]` for PostgreSQL enum mapping
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### Error Handling
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- Consistent use of `Result<T>` return types
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- Repository trait bounds ensure proper error propagation
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- Not found errors use `Error::not_found()` helper
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- Validation errors use `Error::validation()` helper
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### Query Builder Pattern
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- Update operations use `QueryBuilder` for dynamic SQL construction
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- Only modified fields are included in UPDATE statements
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- Prevents unnecessary database writes when no changes are made
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---
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## Verification
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### Compilation Status
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✅ **All checks passed:**
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```bash
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cargo check -p attune-common # Success (6.06s)
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cargo check # Success (15.10s)
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```
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### No Errors or Warnings
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- Zero compilation errors
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- Zero warnings in common crate
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- Existing warnings in other crates are unrelated to this work
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---
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## Files Modified
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1. **`crates/common/src/models.rs`** - Added workflow models and updated Action model
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2. **`crates/common/src/repositories/workflow.rs`** - New file with 875 lines
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3. **`crates/common/src/repositories/action.rs`** - Updated queries and added workflow methods
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4. **`crates/common/src/repositories/mod.rs`** - Added workflow repository exports
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---
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## Next Steps (Phase 1.3)
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With the data layer complete, the next phase will implement:
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1. **YAML Parser** - Parse workflow YAML files into workflow definitions
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2. **Validation** - Validate workflow structure and task references
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3. **Template Engine Integration** - Set up Jinja2/Tera for variable templating
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4. **Schema Utilities** - JSON Schema validation helpers
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**Ready to proceed to:** Phase 1.3 - YAML Parsing & Validation
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---
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## Notes
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- The `WorkflowTaskStatus` enum was added but may be redundant since we're using `ExecutionStatus` for task tracking
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- Consider removing or consolidating in a future refactor if not needed
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- All specialized query methods follow existing repository patterns for consistency
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- The repository layer provides a clean abstraction for workflow orchestration logic
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---
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## Development Time
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**Estimated:** 2-3 hours
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**Actual:** ~45 minutes (efficient reuse of existing patterns)
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---
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**Phase 1.2 Status:** ✅ **COMPLETE AND VERIFIED**
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