---
title: "Class **Phalcon\\Mvc\\Model\\Relation**"
version: "3.4"
---

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# Class **Phalcon\Mvc\Model\Relation**

*implements* [Phalcon\Mvc\Model\RelationInterface](/3.4/api/phalcon_mvc_model_relation/)

<a href="https://github.com/phalcon/cphalcon/tree/v3.4.0/phalcon/mvc/model/relation.zep" class="btn btn-default btn-sm">Source on GitHub</a>

This class represents a relationship between two models

## Constants
*integer* **BELONGS_TO**

*integer* **HAS_ONE**

*integer* **HAS_MANY**

*integer* **HAS_ONE_THROUGH**

*integer* **HAS_MANY_THROUGH**

*integer* **NO_ACTION**

*integer* **ACTION_RESTRICT**

*integer* **ACTION_CASCADE**

## Methods
public  **__construct** (*int* $type, *string* $referencedModel, *string* | *array* $fields, *string* | *array* $referencedFields, [*array* $options])

Phalcon\Mvc\Model\Relation constructor

public  **setIntermediateRelation** (*string* | *array* $intermediateFields, *string* $intermediateModel, *string* $intermediateReferencedFields)

Sets the intermediate model data for has-*-through relations

public  **getType** ()

Returns the relation type

public  **getReferencedModel** ()

Returns the referenced model

public *string* | *array* **getFields** ()

Returns the fields

public *string* | *array* **getReferencedFields** ()

Returns the referenced fields

public *string* | *array* **getOptions** ()

Returns the options

public  **getOption** (*mixed* $name)

Returns an option by the specified name
If the option doesn't exist null is returned

public  **isForeignKey** ()

Check whether the relation act as a foreign key

public *string* | *array* **getForeignKey** ()

Returns the foreign key configuration

public *array* **getParams** ()

Returns parameters that must be always used when the related records are obtained

public  **isThrough** ()

Check whether the relation is a 'many-to-many' relation or not

public  **isReusable** ()

Check if records returned by getting belongs-to/has-many are implicitly cached during the current request

public *string* | *array* **getIntermediateFields** ()

Gets the intermediate fields for has-*-through relations

public  **getIntermediateModel** ()

Gets the intermediate model for has-*-through relations

public *string* | *array* **getIntermediateReferencedFields** ()

Gets the intermediate referenced fields for has-*-through relations

<hr />

# Interface **Phalcon\Mvc\Model\RelationInterface**

<a href="https://github.com/phalcon/cphalcon/tree/v3.4.0/phalcon/mvc/model/relationinterface.zep" class="btn btn-default btn-sm">Source on GitHub</a>

## Methods
abstract public  **setIntermediateRelation** (*mixed* $intermediateFields, *mixed* $intermediateModel, *mixed* $intermediateReferencedFields)

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abstract public  **isReusable** ()

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abstract public  **getType** ()

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abstract public  **getReferencedModel** ()

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abstract public  **getFields** ()

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abstract public  **getReferencedFields** ()

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abstract public  **getOptions** ()

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abstract public  **getOption** (*mixed* $name)

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abstract public  **isForeignKey** ()

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abstract public  **getForeignKey** ()

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abstract public  **isThrough** ()

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abstract public  **getIntermediateFields** ()

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abstract public  **getIntermediateModel** ()

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abstract public  **getIntermediateReferencedFields** ()

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Source: https://docs.phalcon.io/3.4/api/phalcon_mvc_model_relation/index.mdx