Storage and database

• Migrations
  • 1. Migration 1: Schema change
  • 2. Migration 1: Post schema change
  • 3. Migration 2: Schema change
  • Migrate from database.xml
  • Console commands
• Database schema (deprecated)
• Database access
  • Transactions
  • Mappers
  • Entities
• Configuration
  • System values
  • App values
  • User values
• Filesystem
  • Writing to a file
  • Reading from a file
• AppData
  • The simple filesystem