Loading Objects

Notes and features regarding the general loading of mapped objects.

For an in-depth introduction to querying with the SQLAlchemy ORM, please see the Object Relational Tutorial.

• Loading Columns
  • Deferred Column Loading
  • Column Bundles
• Relationship Loading Techniques
  • Configuring Loader Strategies at Mapping Time
  • Relationship Loading with Loader Options
  • Lazy Loading
  • Joined Eager Loading
  • Subquery Eager Loading
  • Select IN loading
  • What Kind of Loading to Use ?
  • Polymorphic Eager Loading
  • Wildcard Loading Strategies
  • Routing Explicit Joins/Statements into Eagerly Loaded Collections
  • Creating Custom Load Rules
  • Relationship Loader API
• Loading Inheritance Hierarchies
  • Using with_polymorphic
  • Polymorphic Selectin Loading
  • Referring to specific subtypes on relationships
  • Loading objects with joined table inheritance
  • Loading objects with single table inheritance
  • Inheritance Loading API
• Constructors and Object Initialization
  • reconstructor()
• Query API
  • The Query Object
  • ORM-Specific Query Constructs