How deeply does Django in Action cover one-to-one relationship?

Implements the model field, deletion behavior, admin integration, and migration workflow without exploring database internals.

One-to-one relationship

As explained in Django in Action

A one-to-one relationship is a relationship in which each record on one side corresponds to at most one record on the other side.

A one-to-one relationship links each record on one side to at most one record on the other. In a web application, it is useful when extra data belongs to a user but should remain separate from the user account itself. section 6.2.2

For RiffMates, UserProfile stores account-related data while keeping musician profiles and controlled venues in separate relationships. The UserProfile model points to User with OneToOneField and uses cascade deletion. section 6.2.2

The implementation follows this flow:

Expose the profile inside Django Admin with a stacked inline, then create migrations before testing the development server. section 6.2.2

How Django in Action covers it

liveBook manning.com

Read Django in Action on liveBook Get the book at manning.com

Also explained in

liveBook manning.com

Grokking Relational Database DesignA one-to-one relationship is a relationship in which each entity instance is associated with at most one instance of the other entity in both directions.
liveBook manning.com

Java Persistence with Spring Data and Hibernate epubA one-to-one association is an association in which each entity instance is related to at most one instance of the other entity type.

Compare how 3 books explain one-to-one relationship →

Related concepts

@OneToOneconfigured by · @OneToOne is a Jakarta Persistence annotation that declares an entity-valued property as a one-to-one association.
foreign keyuses · A foreign key is a column or set of columns in a relational table whose values reference a candidate key in the same or another table, establishing a relationship and supporting referential integrity.
shared primary key valueincludes · A shared primary key value is a one-to-one mapping strategy in which associated entities use the same database primary-key value.
minimum cardinalityconfigured by · Minimum cardinality is the smallest number of related entity instances required or permitted for an entity instance in a relationship.

This explainer was generated by Manning's knowledge graph from the text of Django in Action. The section links point to the parts of the book it draws on.