Learning Mongoid -- Table of Contents -- Learning Mongoid -- Credits -- About the Author -- About the Reviewers -- www.PacktPub.com -- Support files, eBooks, discount offers and more -- Why Subscribe? -- Free Access for Packt account holders -- Preface -- What this book covers -- What you need for this book -- Who this book is for -- Conventions -- Reader feedback -- Customer support -- Downloading the example code -- Errata -- Piracy -- Questions -- 1. What's so Awesome about Mongoid? -- A practical approach using the Sodibee library system -- Checking prerequisites -- Ruby version -- MongoDB version -- Setting up Sodibee -- Creating models -- Testing the models -- Introducing Moped -- Dynamic attributes -- Introducing Origin -- Notice about Mongoid 2.x -- Mongoid and MongoMapper -- Summary -- 2. Mongoid Document Model -- The Mongoid document -- Basic attributes -- Arrays and hashes -- Date and time attributes -- Serialization with Mongoize -- Field aliases -- Embedded documents -- Localization -- Mass assignment and security -- Summary -- 3. Persisting Documents -- MongoDB persistence strategy -- Binary JSON (BSON) -- Memory maps, delayed sync, and journals -- Creating documents -- Updating documents and attributes -- Database locks and transactions -- Applications and lock versioning -- The MongoDB findAndModify method -- Atomic attribute updates -- Dynamic attributes -- Nested attributes -- Validations -- Callbacks -- Summary -- 4. Mongoid Relations -- Configuring relationships -- Common options for all relations -- :class_name -- :inverse_of -- Relation-specific options -- has_one - the one-to-one relation -- :as -- :autosave -- :autobuild -- :dependent -- :primary_key -- :foreign_key -- :validate -- has_many - the many-to-one relation -- :order -- :before_add, :after_add, :before_remove, and :after_remove -- The belongs_to relation.

:index -- :polymorphic -- :touch -- :counter_cache -- has_and_belongs_to_many - the many-to-many relation -- :inverse_of -- Polymorphic relations -- embeds_many - embedding many documents -- :cascade_callbacks -- :store_as -- :cyclic -- embeds_one - embed one document -- embedded_in - resolving children -- Embedded polymorphic relations -- Summary -- 5. Mongoid Queries -- Origins of Origin -- Query selectors -- Overloading the Symbol class -- Mongoid criteria -- Queries on arrays and hashes -- Scopes -- Atomic modifiers -- find_and_modify -- Querying with indexed fields -- Covered queries -- The aggregation framework -- Geolocation queries -- Summary -- 6. Performance Tuning -- MongoDB environment -- Indexes -- Write concern -- Compound index -- Multikey index -- Hashed index -- Text index -- IdentityMap -- n+1 query problem and eager loading -- MapReduce and the aggregation framework -- Using the aggregation framework -- Choosing between MapReduce and the aggregation framework -- Monitoring query performance -- Profiling MongoDB -- Statistical data -- Hint and currentOp -- Good practices and recommendations -- Summary -- 7. Mongoid Modules -- Timestamping -- Versioning -- Paranoia -- Acts as state machine (aasm) -- carrierwave -- mongoid-audit -- devise -- Summary -- Index.