Doctrine save() only checks one level deep on one-to-one relations.

Updating/saving an object fails when trying to update the nth-level of an existing object/relation where n is more than one level away from the root node of one-to-one relation chain. For example, with the yaml model below the following does not update the name of the Company object:

Image->Product->Category->Company->name = "Acme".

If "Product" has no changes it appears to stop checking for changes there. If we do a save on a one-to-many relation chain such as the following, it works fine:

Company->Category->Product->Image->name = "image1.jpg"

I was able to fix this issue by modifying the saveRelatedLocalKeys() function in UnitOfWork.php to use isModified() with deep=true:

if ($obj instanceof Doctrine_Record && $obj->isModified(true)) {

This works but I'm not sure if changing this has any repercussions on more complex queries.

—
detect_relations: true
options:
collate: utf8_general_ci
charset: utf8
type: InnoDB

Company:
tableName: Company
columns:
id:
type: integer(4)
primary: true
notnull: true
autoincrement: true
name:
type: string(45)

Category:
tableName: Category
columns:
id:
type: integer(4)
primary: true
notnull: true
autoincrement: true
companyId:
type: integer(4)
notnull: true
name:
type: string(45)
relations:
Company:
class: Company
local: companyId
foreign: id
foreignAlias: categories
onDelete: cascade
onUpdate: cascade
indexes:
fk_Category_Company1:
fields: [companyId]

Product:
tableName: Product
columns:
id:
type: integer(4)
primary: true
notnull: true
autoincrement: true
categoryId:
type: integer(4)
notnull: true
name:
type: string(45)
relations:
Category:
class: Category
local: categoryId
foreign: id
foreignAlias: products
onDelete: cascade
onUpdate: cascade
indexes:
fk_Product_Category1:
fields: [categoryId]

Image:
tableName: Image
columns:
id:
type: integer(4)
primary: true
notnull: true
autoincrement: true
productId:
type: integer(4)
notnull: true
name:
type: string(45)
relations:
Product:
class: Product
local: productId
foreign: id
foreignAlias: images
onDelete: cascade
onUpdate: cascade
indexes:
fk_Image_Product1:
fields: [productId]