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Learning Mongoid

You're reading from   Learning Mongoid If you know MongoDB and Ruby, then Mongoid is a very handy tool to have at your disposal. Quickly learn to build Rails applications with the helpful code samples and instructions in this book.

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Product type Paperback
Published in Dec 2013
Publisher Packt
ISBN-13 9781782167501
Length 140 pages
Edition 1st Edition
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Gautam Rege Gautam Rege
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Gautam Rege
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Toc

Configuring relationships


Before we study the methods in detail, we need to understand that all relations can specify the parameters that configure the relation. Each relation follows the following pattern:

  • name: This is the mandatory name of the relation and is a symbol by which the relation will be referenced.

  • options: This is a hash that is used to configure the relation.

  • block: This is an optional block of code to configure some relations.

Common options for all relations

The following options are common to all relations:

  • :class_name: This is the class name if it cannot be determined from the name.

  • :inverse_of: This is the reverse relation, it is very important for creating or embedding relations.

  • :extend: If we need to configure the relation by passing a block, a module is created on the fly with this block and the relation class then extends from this module.

  • :inverse_class_name: This is used to determine the foreign key.

  • :name: This is the name of the relation.

  • :relation: This is the type of...

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