{"id":9130,"date":"2024-09-13T07:47:42","date_gmt":"2024-09-13T07:47:42","guid":{"rendered":"https:\/\/www.infinitivehost.com\/knowledge-base\/?p=9130"},"modified":"2024-09-13T08:51:43","modified_gmt":"2024-09-13T08:51:43","slug":"how-to-use-write-method-on-a-many2many-field-in-odoo","status":"publish","type":"post","link":"https:\/\/www.infinitivehost.com\/knowledge-base\/how-to-use-write-method-on-a-many2many-field-in-odoo\/","title":{"rendered":"How to Use write() Method on a Many2many Field in Odoo"},"content":{"rendered":"<div class='epvc-post-count'><span class='epvc-eye'><\/span>  <span class=\"epvc-count\"> 4,252<\/span><span class='epvc-label'> Views<\/span><\/div>\n<p class=\"wp-block-paragraph\">The <code><mark style=\"background-color:#fcb900\" class=\"has-inline-color\">write()<\/mark><\/code> method in Odoo is used to update the values of records in a model. When working with a <code><mark style=\"background-color:#fcb900\" class=\"has-inline-color\">many2many<\/mark><\/code> field, the <code><mark style=\"background-color:#fcb900\" class=\"has-inline-color\">write()<\/mark><\/code> method can be used to add, remove, or replace the associated records in that field.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">How to Use the <code><mark style=\"background-color:#fcb900\" class=\"has-inline-color\">write()<\/mark><\/code> Method on a <code><mark style=\"background-color:#fcb900\" class=\"has-inline-color\">many2many<\/mark><\/code> Field<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A <code><mark style=\"background-color:#fcb900\" class=\"has-inline-color\">many2many<\/mark><\/code> field represents a bi-directional relationship between two models where multiple records of one model can be associated with multiple records of another model. The <code><mark style=\"background-color:#fcb900\" class=\"has-inline-color\">write()<\/mark><\/code> method on a <code><mark style=\"background-color:#fcb900\" class=\"has-inline-color\">many2many<\/mark><\/code> field takes specific commands to manage these relationships. The commands used to manipulate <code><mark style=\"background-color:#fcb900\" class=\"has-inline-color\">many2many<\/mark><\/code> fields are:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Add (<code><mark style=\"background-color:#fcb900\" class=\"has-inline-color\">(4, id)<\/mark><\/code>)<\/strong>: Adds a record with a specific ID to the <code><mark style=\"background-color:#fcb900\" class=\"has-inline-color\">many2many<\/mark><\/code> field.<\/li>\n\n\n\n<li><strong>Remove (<code><mark style=\"background-color:#fcb900\" class=\"has-inline-color\">(3, id)<\/mark><\/code>)<\/strong>: Removes a record with a specific ID from the <code><mark style=\"background-color:#fcb900\" class=\"has-inline-color\">many2many<\/mark><\/code> field.<\/li>\n\n\n\n<li><strong>Replace (<code><mark style=\"background-color:#fcb900\" class=\"has-inline-color\">(6, 0, [id1, id2, ...])<\/mark><\/code>)<\/strong>: Replaces all existing records in the <code><mark style=\"background-color:#fcb900\" class=\"has-inline-color\">many2many<\/mark><\/code> field with the list of IDs provided.<\/li>\n\n\n\n<li><strong>Clear (<code><mark style=\"background-color:#fcb900\" class=\"has-inline-color\">(5, )<\/mark><\/code>)<\/strong>: Clears all records from the <code><mark style=\"background-color:#fcb900\" class=\"has-inline-color\">many2many<\/mark><\/code> field.<\/li>\n\n\n\n<li><strong>Create and Link (<code><mark style=\"background-color:#fcb900\" class=\"has-inline-color\">(0, 0, {vals})<\/mark><\/code>)<\/strong>: Creates a new record with the values provided and links it to the <code><mark style=\"background-color:#fcb900\" class=\"has-inline-color\">many2many<\/mark><\/code> field.<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\">Practical Examples<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Let\u2019s assume we have the following models:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Book Model (<code><mark style=\"background-color:#fcb900\" class=\"has-inline-color\">library.book<\/mark><\/code>)<\/strong><\/li>\n\n\n\n<li><strong>Author Model (<code><mark style=\"background-color:#fcb900\" class=\"has-inline-color\">library.author<\/mark><\/code>)<\/strong><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">The <code><mark style=\"background-color:#fcb900\" class=\"has-inline-color\">library.book<\/mark><\/code> model has a <code><mark style=\"background-color:#fcb900\" class=\"has-inline-color\">many2many<\/mark><\/code> field named <code><mark style=\"background-color:#fcb900\" class=\"has-inline-color\">author_ids<\/mark><\/code> that links to the <code><mark style=\"background-color:#fcb900\" class=\"has-inline-color\">library.author<\/mark><\/code> model.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code><code><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-red-color\">class LibraryBook(models.Model):\n    _name = 'library.book'\n    _description = 'Book Record'\n\n    name = fields.Char(string='Title', required=True)\n    author_ids = fields.Many2many('library.author', string='Authors')<\/mark><\/code><\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Now, let&#8217;s see how to use the <code><mark style=\"background-color:#fcb900\" class=\"has-inline-color\">write()<\/mark><\/code> method to modify the <code><mark style=\"background-color:#fcb900\" class=\"has-inline-color\">many2many<\/mark><\/code> field <code><mark style=\"background-color:#fcb900\" class=\"has-inline-color\">author_ids<\/mark><\/code>:<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">1. <strong>Adding an Author to a Book<\/strong><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">To add an existing author to a book, you can use the <code><mark style=\"background-color:#fcb900\" class=\"has-inline-color\">(4, id)<\/mark><\/code> command:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code><code><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-red-color\"># Find the book and author records\nbook = self.env&#91;'library.book'].browse(book_id)\nauthor_id = 5  # Example author ID to be added\n\n# Add the author to the book's author_ids field\nbook.write({'author_ids': &#91;(4, author_id)]})<\/mark><\/code><\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\">2. <strong>Removing an Author from a Book<\/strong><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">To remove an author from a book, you can use the <code><mark style=\"background-color:#fcb900\" class=\"has-inline-color\">(3, id)<\/mark><\/code> command:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code><code><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-red-color\"># Find the book record\nbook = self.env&#91;'library.book'].browse(book_id)\nauthor_id = 5  # Example author ID to be removed\n\n# Remove the author from the book's author_ids field\nbook.write({'author_ids': &#91;(3, author_id)]})<\/mark><\/code><\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\">3. <strong>Replacing All Authors for a Book<\/strong><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">To replace all existing authors with a new list of authors, use the <code><mark style=\"background-color:#fcb900\" class=\"has-inline-color\">(6, 0, [id1, id2, ...])<\/mark><\/code> command:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code><code><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-red-color\"># Find the book record\nbook = self.env&#91;'library.book'].browse(book_id)\nnew_author_ids = &#91;1, 2, 3]  # New list of author IDs\n\n# Replace all existing authors with the new list\nbook.write({'author_ids': &#91;(6, 0, new_author_ids)]})<\/mark><\/code><\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\">4. <strong>Clearing All Authors from a Book<\/strong><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">To remove all authors associated with a book, use the <code><mark style=\"background-color:#fcb900\" class=\"has-inline-color\">(5,)<\/mark><\/code> command:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code><code><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-red-color\"># Find the book record\nbook = self.env&#91;'library.book'].browse(book_id)\n\n# Clear all authors from the book's author_ids field\nbook.write({'author_ids': &#91;(5,)]})<\/mark><\/code><\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\">5. <strong>Creating a New Author and Linking It to a Book<\/strong><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">To create a new author and directly link it to a book, use the <code><mark style=\"background-color:#fcb900\" class=\"has-inline-color\">(0, 0, {vals})<\/mark><\/code> command:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code><code><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-red-color\"># Find the book record\nbook = self.env&#91;'library.book'].browse(book_id)\nnew_author_data = {'name': 'New Author Name'}  # Data for the new author\n\n# Create a new author and link it to the book\nbook.write({'author_ids': &#91;(0, 0, new_author_data)]})<\/mark><\/code><\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Conclusion<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The simple\u00a0<code><mark style=\"background-color:#fcb900\" class=\"has-inline-color\">write()<\/mark><\/code>\u00a0method in <a href=\"https:\/\/www.infinitivehost.com\/managed-odoo-server-solutions\"><mark style=\"background-color:#8ed1fc\" class=\"has-inline-color\"><strong>managed Odoo server solutions<\/strong><\/mark><\/a> is utilized to update the values of previous records in any model. At the time of working with a\u00a0<code><mark style=\"background-color:#fcb900\" class=\"has-inline-color\">many2many<\/mark><\/code>\u00a0field, this method can be specially used to add, delete, or replace the related records in that specific field.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>4,252 Views The write() method in Odoo is used to update the values of records in a model. When working with a many2many field, the write() method can be used to add, remove, or replace the associated records in that field. How to Use the write() Method on a many2many Field A many2many field represents [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"footnotes":""},"categories":[203],"tags":[],"class_list":["post-9130","post","type-post","status-publish","format-standard","hentry","category-odoo"],"_links":{"self":[{"href":"https:\/\/www.infinitivehost.com\/knowledge-base\/wp-json\/wp\/v2\/posts\/9130","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.infinitivehost.com\/knowledge-base\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.infinitivehost.com\/knowledge-base\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.infinitivehost.com\/knowledge-base\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.infinitivehost.com\/knowledge-base\/wp-json\/wp\/v2\/comments?post=9130"}],"version-history":[{"count":2,"href":"https:\/\/www.infinitivehost.com\/knowledge-base\/wp-json\/wp\/v2\/posts\/9130\/revisions"}],"predecessor-version":[{"id":9135,"href":"https:\/\/www.infinitivehost.com\/knowledge-base\/wp-json\/wp\/v2\/posts\/9130\/revisions\/9135"}],"wp:attachment":[{"href":"https:\/\/www.infinitivehost.com\/knowledge-base\/wp-json\/wp\/v2\/media?parent=9130"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.infinitivehost.com\/knowledge-base\/wp-json\/wp\/v2\/categories?post=9130"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.infinitivehost.com\/knowledge-base\/wp-json\/wp\/v2\/tags?post=9130"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}