196 lines
8.3 KiB
Python
196 lines
8.3 KiB
Python
# services/training/app/models/training.py
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"""
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Database models for training service
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"""
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from sqlalchemy import Column, Integer, String, DateTime, Text, Boolean, JSON, Float
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from sqlalchemy.dialects.postgresql import UUID, ARRAY
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from shared.database.base import Base
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from datetime import datetime, timezone
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import uuid
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class ModelTrainingLog(Base):
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"""
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Table to track training job execution and status.
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Replaces the old Celery task tracking.
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"""
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__tablename__ = "model_training_logs"
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id = Column(Integer, primary_key=True, index=True)
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job_id = Column(String(255), unique=True, index=True, nullable=False)
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tenant_id = Column(UUID(as_uuid=True), nullable=False, index=True)
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status = Column(String(50), nullable=False, default="pending") # pending, running, completed, failed, cancelled
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progress = Column(Integer, default=0) # 0-100 percentage
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current_step = Column(String(500), default="")
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# Timestamps
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start_time = Column(DateTime(timezone=True), default=lambda: datetime.now(timezone.utc))
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end_time = Column(DateTime(timezone=True), nullable=True)
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# Configuration and results
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config = Column(JSON, nullable=True) # Training job configuration
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results = Column(JSON, nullable=True) # Training results
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error_message = Column(Text, nullable=True)
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# Metadata
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created_at = Column(DateTime(timezone=True), default=lambda: datetime.now(timezone.utc))
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updated_at = Column(DateTime(timezone=True), default=lambda: datetime.now(timezone.utc), onupdate=lambda: datetime.now(timezone.utc))
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class ModelPerformanceMetric(Base):
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"""
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Table to track model performance over time.
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"""
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__tablename__ = "model_performance_metrics"
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id = Column(Integer, primary_key=True, index=True)
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model_id = Column(String(255), index=True, nullable=False)
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tenant_id = Column(UUID(as_uuid=True), nullable=False, index=True)
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inventory_product_id = Column(UUID(as_uuid=True), index=True, nullable=False)
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# Performance metrics
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mae = Column(Float, nullable=True) # Mean Absolute Error
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mse = Column(Float, nullable=True) # Mean Squared Error
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rmse = Column(Float, nullable=True) # Root Mean Squared Error
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mape = Column(Float, nullable=True) # Mean Absolute Percentage Error
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r2_score = Column(Float, nullable=True) # R-squared score
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# Additional metrics
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accuracy_percentage = Column(Float, nullable=True)
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prediction_confidence = Column(Float, nullable=True)
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# Evaluation information
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evaluation_period_start = Column(DateTime, nullable=True)
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evaluation_period_end = Column(DateTime, nullable=True)
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evaluation_samples = Column(Integer, nullable=True)
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# Metadata
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measured_at = Column(DateTime(timezone=True), default=lambda: datetime.now(timezone.utc))
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created_at = Column(DateTime(timezone=True), default=lambda: datetime.now(timezone.utc))
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class TrainingJobQueue(Base):
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"""
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Table to manage training job queue and scheduling.
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"""
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__tablename__ = "training_job_queue"
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id = Column(Integer, primary_key=True, index=True)
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job_id = Column(String(255), unique=True, index=True, nullable=False)
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tenant_id = Column(UUID(as_uuid=True), nullable=False, index=True)
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# Job configuration
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job_type = Column(String(50), nullable=False) # full_training, single_product, evaluation
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priority = Column(Integer, default=1) # Higher number = higher priority
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config = Column(JSON, nullable=True)
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# Scheduling information
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scheduled_at = Column(DateTime, nullable=True)
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started_at = Column(DateTime, nullable=True)
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estimated_duration_minutes = Column(Integer, nullable=True)
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# Status
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status = Column(String(50), nullable=False, default="queued") # queued, running, completed, failed
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retry_count = Column(Integer, default=0)
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max_retries = Column(Integer, default=3)
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# Metadata
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created_at = Column(DateTime(timezone=True), default=lambda: datetime.now(timezone.utc))
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updated_at = Column(DateTime(timezone=True), default=lambda: datetime.now(timezone.utc), onupdate=lambda: datetime.now(timezone.utc))
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cancelled_by = Column(String, nullable=True)
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class ModelArtifact(Base):
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"""
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Table to track model files and artifacts.
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"""
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__tablename__ = "model_artifacts"
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id = Column(Integer, primary_key=True, index=True)
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model_id = Column(String(255), index=True, nullable=False)
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tenant_id = Column(UUID(as_uuid=True), nullable=False, index=True)
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# Artifact information
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artifact_type = Column(String(50), nullable=False) # model_file, metadata, training_data, etc.
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file_path = Column(String(1000), nullable=False)
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file_size_bytes = Column(Integer, nullable=True)
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checksum = Column(String(255), nullable=True) # For file integrity
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# Storage information
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storage_location = Column(String(100), nullable=False, default="local") # local, s3, gcs, etc.
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compression = Column(String(50), nullable=True) # gzip, lz4, etc.
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# Metadata
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created_at = Column(DateTime(timezone=True), default=lambda: datetime.now(timezone.utc))
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expires_at = Column(DateTime(timezone=True), nullable=True) # For automatic cleanup
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class TrainedModel(Base):
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__tablename__ = "trained_models"
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# Primary identification - Updated to use UUID properly
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id = Column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
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tenant_id = Column(UUID(as_uuid=True), nullable=False, index=True)
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inventory_product_id = Column(UUID(as_uuid=True), nullable=False, index=True)
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# Model information
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model_type = Column(String, default="prophet_optimized")
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model_version = Column(String, default="1.0")
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job_id = Column(String, nullable=False)
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# File storage
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model_path = Column(String, nullable=False) # Path to the .pkl file
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metadata_path = Column(String) # Path to metadata JSON
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# Training metrics
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mape = Column(Float)
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mae = Column(Float)
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rmse = Column(Float)
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r2_score = Column(Float)
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training_samples = Column(Integer)
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# Hyperparameters and features
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hyperparameters = Column(JSON) # Store optimized parameters
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features_used = Column(JSON) # List of regressor columns
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normalization_params = Column(JSON) # Store feature normalization parameters for consistent predictions
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# Model status
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is_active = Column(Boolean, default=True)
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is_production = Column(Boolean, default=False)
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# Timestamps - Updated to be timezone-aware with proper defaults
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created_at = Column(DateTime(timezone=True), default=lambda: datetime.now(timezone.utc))
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updated_at = Column(DateTime(timezone=True), default=lambda: datetime.now(timezone.utc), onupdate=lambda: datetime.now(timezone.utc))
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last_used_at = Column(DateTime(timezone=True))
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# Training data info
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training_start_date = Column(DateTime(timezone=True))
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training_end_date = Column(DateTime(timezone=True))
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data_quality_score = Column(Float)
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# Additional metadata
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notes = Column(Text)
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created_by = Column(String) # User who triggered training
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def to_dict(self):
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return {
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"id": str(self.id),
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"model_id": str(self.id),
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"tenant_id": str(self.tenant_id),
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"inventory_product_id": str(self.inventory_product_id),
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"model_type": self.model_type,
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"model_version": self.model_version,
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"model_path": self.model_path,
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"mape": self.mape,
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"mae": self.mae,
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"rmse": self.rmse,
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"r2_score": self.r2_score,
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"training_samples": self.training_samples,
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"hyperparameters": self.hyperparameters,
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"features_used": self.features_used,
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"is_active": self.is_active,
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"is_production": self.is_production,
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"created_at": self.created_at.isoformat() if self.created_at else None,
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"updated_at": self.updated_at.isoformat() if self.updated_at else None,
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"last_used_at": self.last_used_at.isoformat() if self.last_used_at else None,
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"training_start_date": self.training_start_date.isoformat() if self.training_start_date else None,
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"training_end_date": self.training_end_date.isoformat() if self.training_end_date else None,
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"data_quality_score": self.data_quality_score
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} |