Can anybody help me?1. x Eloquent method to update, create or delete dynamic input. ON DELETE CASCADE clause in MySQL is used to automatically remove the matching records from the child table when we delete the rows from the parent table. 3 Answers. You should be able to do exactly as you ask (assuming here that the user's id is 1)I have an existing foreign key that has ON DELETE NO ACTION defined. Deleting MongoDB Document using Laravel. Laravel Eloquent Cascading Deletes. Since even the "cascade" is not triggered, I "set null" is not the problem. Laravel advances to version 7 on March 3rd, 2020 with updates to Blade components, custom casting, fluent string operations, a friendly HTTP client, and much more. 2. I added cascade delete tasks. group_user, CONSTRAINT group_user_group_id_foreign FOREIGN KEY (group_id) REFERENCES groups (id) ON. What's the difference between the two annotations?. 1. or if you creating the table with migration then you need to define the relation in migration something like below: Jan 16, 2020 at 23:14. 112k 14 123 149. This column is intended to store the deleted_at timestamp needed for Eloquent's "soft delete" functionality:. Laravel CascadeSoftDeletes Introduction. ON DELETE CASCADE オプションは親テーブル（参照先のテーブル）を削除するときに子テーブル（参照元のテーブル）も一緒に削除するために使用するオプションになります. Laravel advances to version 7 on March 3rd, 2020 with updates to Blade components, custom casting, fluent string operations, a friendly HTTP client, and much more. The example below listens for the deleted event on the Product model and cascades this to the child models. I want to Eloquent (ORM) behaves like JPA (Java) managing collections using cascade. All is linked to user table. Tried to use foreign keys with delete cascade and softDeletes without much luck. But when im deleting from the category controller, it only deletes in that category table, but. If you think about that case from very beginning of your project, you just set up foreign keys in migration file, with cascading delete. post_id set to NULL. Generally, when MySQL points to the "right syntax to use near '", look to the character immediately before the single quote. Share. 4 paragraphs below. when i tried delete item in laravel i get this message SQLSTATE[23000]: Integrity constraint violation: 1451 Cannot delete or update a parent row: a foreign key constraint fails (larblog. class Product extends Eloquent { public function descriptions. Relations menu. Both ON DELETE CASCADE and ON UPDATE CASCADE are supported. Cannot add foreign key constrain on delete cascade. Correct me if i'm wrong: the taggable_id field is not a real foreign key field. 2. What's New in Laravel 8. My question is related to Laravel, I have product model and categories. Best Answer You will need to rely on Eloquent rather than cascading deletes in the database - your app doesn't really know about how your database will cascade deletes. That Laravel’s documentation is rich in content no one can deny, but it does not mean that it has everything it can offer us. Laravel adding cascade on delete to an existing table. onDelete('cascade') not deleting data on pivot table. So let's see the example code of laravel foreign key constraint in migration. In this series, we'll demystify much of Laravel's magic for developers who may not understand how all the pieces. 0 cascade delete and polymorphic relations. Branches Tags. This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository. On the Image model I have a custom delete method which deletes the image from the s3 storage. Link to this answer Share Copy. Laravel `delete()` affecting other timestamp columns. In scenarios when you delete a parent record - say for example a blog post - you may want to also delete any comments associated with it as a form of self-maintenance of your data. Laravel "backwards" foreign key delete using controller. Cascade Delete & Restore when using SoftDeletes. Installation Install with composer composer requi. Laravel 5 Deleting a one-to-many relationship. This will end up calling the base Query Builder's delete method in the end to do a delete query directly; it does not call the delete method on the Model, which is what fires the Model events. Can't restore soft delete data. IlluminateDatabaseQueryException : SQLSTATE[23000]: Integrity constraint violation: 1452 Cannot add or update a child row: a foreign key constraint fails (myapp_extra. Main_categories_migration: -SQLSTATE[23000]: Integrity constraint violation: 1451 Cannot delete or update a parent row: a foreign key constraint fails (Connection: mysql, SQL: drop table if exists administrators) I've tried nullOnDelete() instead of onDelete('set null'), same issue. RESTRICT Michael Dyrynda has a new package for cascading soft deletes with Laravel and Eloquent. And then add a few things in out app/Project. pravinyam_usermaster ( userid Text, password Text, role user_role, user_group Text, FOREIGN KEY (user_group) REFERENCES. I have 4 tables. I don't think you need to delete the list even if the user who is not the creator but only have access to it. Improve this answer. I have a Laravel 8 project and I must implement cascade delete on it. 1- Use the trait within models that has child morph relations. Building the Trigger. In Laravel, you can set the value of a related or relation to "null" when deleting a record from the schema itself and to do that you can make use of the "nullOnDelete()" method on the schema on Laravel 8. But deleting the record on users table which students table link to will delete the record on students table accordingly. CASCADE Automatically drop objects that depend on the table (such as views), and in turn all objects that depend on those objects (see Section 5. My simple app is this: I create a AppMessage. Perform the actual delete query on this model instance. The app is built using laravel , tailwind css and postgreshow work cascade laravel; delete multiple row by model in laravel; laravel delete relationship data; Laravel eloquent delete; what is the equivalent of cascade on delete in mongoose; laravel destroy or delete; modify existing foriegn key to delete cascade; on_delete=models. A foreign key relationship involves a parent table that holds the initial column values, and a child table with column values that reference the parent column values. And then, to delete user with all related data, there are two methods: Method 1. Like I told you on my last posting, we’re going to make tables with Foreign Key that you can revise or delete freely today. ADD CONSTRAINT fk_htk_id_sanpham. Laravel 9 foreign key constraint : Example one. Deleting a model this way can slow down the application’s response especially when the model has a lot of dependencies you wish to delete alongside. This version of our popular Laravel From Scratch series was. laravel5. – Vinay. Cascade delete of a many to many relation table. g AgeRatings with a pivot table called film_age_rating which contains a film_id as a foreign key I have this with 3 other relations too. I have an Laravel 4 app with polls and different options or choices to vote. Laravel adding cascade on delete to an existing table. ON DELETE CASCADEMichael Dyrynda has a new package for cascading soft deletes with Laravel and Eloquent. how work cascade laravel; laravel 7 eloquent on delete set null schema; Laravel return empty relationship on model when condition is true; how set cascade on delete and update in same time in laravel; ON DELETE CASCADE vs ON UPDATE CASCADE; ondelete set null laravel; on delete cascade; on delete cascade; on delete. Dec 13, 2022 at 8:15 Add a comment 6 Answers Sorted by: 227 If you like the Parent and Child terms and you feel they are easy to be remembered, you may like the translation of ON DELETE CASCADE to Leave No Orphans! Which means that when a Parent row is deleted (killed), no orphan row should stay alive in the Child table. OnDelete-Cascade is not being "fired" 0. Ví dụ. Laravel adding cascade on delete to an existing table. 6 mysql 14. public function destroy (Transaction $transaction) { $transaction->delete (); return redirect ()->route. class. Ask Question Asked 6 years, 5 months ago. Laravel 5: cascade soft delete. This website has also grown with me and is now something that I am proud of. are deleted. 0 you can use $table->foreignId ('user_id'); it is an alias of $table->unsignedBigInteger ('user_id'); So our oneline solution to make the foreign key column delete cascade is as below: $table->foreignId ('user_id')->constrained ('users')->onDelete ('cascade'); Share. How to use delete on cascade in Laravel? 2. Cannot add foreign key constrain on delete cascade. I have 3 related tables / models in Laravel 4. 外部キー制約での ON DELETE CASCADE オプションの使い方を具体的な例を使って解説します。. Two of them are monomorphic and two of them are polymorphic. My undersatnding is that when using onDelete('cascade'), if I delete a subscription, then all associated TopicsToSubscriptions will be delete. Sign in to participate in this thread! The Laravel portal for problem solving, knowledge sharing and community building. Learn more about Teamsdelete cascade laravel not working. cheers. Tested on Laravel 8 with php 8, but it should work fine on laravel 6,7 with php ^7|^8. CASCADE: Delete or update the row from the parent table, and automatically delete or update the matching rows in the child table. * * @license MIT * @package CompanyPackage */ use Illuminate. (See dbudimir's answer for the example lines from a Laravel migration file) Add cascade/delete functionality to existing migration. Another option would be to create an event handler for the deleting event. Soft Deleting through relationships. Hot Network Questions Longest Consecutive SequenceTaking the "posts and comments" example. Yeah, this particular example works now. Prevent on cascade delete on Laravel. This column is intended to store the deleted_at timestamp needed for Eloquent's "soft delete" functionality:. If you need Eloquent events to fire on the deleted child records, you'll need to ditch cascadeOnDelete, and implement the deletion cascade yourself via a deleted event on the parent model. tags. To solve the issue, the CREATE TABLE statement should have been: CREATE TABLE followers ( id_follower INT NOT NULL, id_following INT NOT NULL, PRIMARY KEY (id_follower, id_following), CONSTRAINT follower_fk FOREIGN. 6 mysql 14. The deleted model event is the one to use if you want to delete the related records AFTER you delete the parent record. How to change constraint FOREIGN KEY in mysql 8 from `ON DELETE CASCADE` to `ON DELETE SET NULL` in laravel migration or raw sql. id column. A cascading delete happens at the database level. 0 cascade delete and polymorphic relations. . Now when Im deleting video, I delete - video, video comments, video feed, but I need delete also video comment feeds. 2- Delete from Notifications where type IS Comment AND id in (ids). Laravel onDelete cascade many-to-many relationship. Related questions. In Laravel, we can apply the CASCADE operation like this:Delete and restore cascade using model events, when you restore, just keep deleted relations that where deleted before the Project deleted_at (this approach can generate a lot of queries, its is bad for huge number of records) Delete only the Project, when you enter some route that needs requests or comments from the deleted Project you check. If you define a relationship with ON DELETE CASCADE, the foriegn row will definitely be deleted. if you are actually deleting (rather than soft delete) then you can use a on delete cascade on the database table. Popularity 10/10 Helpfulness 10/10 Language php. I can do this within a transaction: begin; alter table posts drop constraint posts_blog_id_fkey; alter table posts add constraint posts_blog_id_fkey foreign key (blog_id) references blogs (id) on update no. 11. So, if i delete a task then it will deleted. PHP 2022-03-27 23:05:06 laravel schedule run PHP 2022-03-27 22:25:12 Get page title, excerpt or content by id PHP 2022-03-27 22:00:27 php convert date from dd/mm/yyyy to yyyy-mm-ddAPI using testing in Laravel. 4- Delete The Notifications Related to the Post 5-. Laravel advances to version 7 on March 3rd, 2020 with updates to Blade components, custom casting, fluent string operations, a friendly HTTP client, and much more. You want to cascade it, your syntax seems off, i'm not sure if it is an alternative way. 10, and the database I'm using is MariaDB 11. I have 3 tables products (id, name), urls (id, page_id, request_id) and product_url (product_id, url_id, site_id). Since soft deletes don’t actually delete any records we need some way to cascade, or iterate over each, related model. I do not receive any errors. My 'news' Table have Relationship (Belongs To Many) to 'catg' and the news_catg is the pivot ta. * * @license MIT * @package Company\Package */ use Illuminate. Laracasts Elite. Edit for lack of coffee when originally responding and for much greater clarity. Posted 5 years ago. The Code table contains Id, Name, FriendlyName,. I want to delete all the children if the parent is deleted. 2 delete model with all relations. Not the other way around. Both tables have softDeletes. Cannot add foreign key constrain on delete cascade. 3. Each lesson, geared toward newcomers to Laravel, will provide instructions and techniques that will get you to the finish line. Note that MySQL will implicitly use utf8mb4 encoding if a utf8mb4_* collation is specified (without any explicit character set). Modified 4 months ago. Needing to delete children first can be a hassle but you don't want to make it easy to permanently remove something IMO. I think Laravel does not even construct the models it deletes, so it also won't call the static::. 35. Laravel 4. In this series, we'll review and compare all the new features and improvements you can enjoy as part of Laravel 10. When a user delete from user table, all session_requests related to him want to delete. answered Nov 30, 2012 at 8:20. In all of the >4. events. 8, the users_table uses bigIncrements('id') data type for the primary key. I have 2 tables: Users, Events. 0. Each migration file name contains a timestamp which allows Laravel to determine the order of the migrations. It's not obvious from the code you posted, but your DELETE route expects DELETE method. Tried to use foreign keys with delete cascade and softDeletes without much luck. William shows us how to use Laravel Soft Delete functionality to retain deleted records in our database. I would now like to use only two listeners and clean up the Listeners folder. Laravel onDelete('cascade') does not work. Level 8 jrean OP Posted 8 years ago On Delete Cascade Hi, I have a Venue and Event table. 0 cascade delete and polymorphic relations. I am developing a project in Laravel 8. CASCADE delete, if I'm using the correct term. users (errno: 150 "Foreign key constraint is incorrectly formed") (SQL: alter table users add. REMOVE I'll be able to delete foreign keys in my table , but I sill got an exception. we will give you. Filter one category of a product, but bring all. Laravel adding cascade on delete to an existing table. The first one is useful if you want to delete the related records BEFORE you delete the parent record. Furthermore, InnoDB does not recognize or support “inline REFERENCES specifications” (as defined in the SQL standard) where the references are defined as part of the column specification. There are important caveats for using this method, and it's important to understand that Eloquent implements its own query builder class, much as it does its own collection class. 0 I have 3 tables. use. 2. id the records that were related have their comment. Cascading deletes are handled at the database-level, so when you set onDelete ('cascade') in your migration, that translates to your database deleting. As you delete the contents of sno=2 in the parent table it automatically deletes the details of sno=2 from the child table also. 2. You may want to write a stored procedure to do it. Monomorphic: Templates, Modules Polymorphic: Documents, Images Now, templates and modules have both documents and images and each Template has many Modules and modules have foreign key that is set to cascade on deletion of templates. Cannot drop foreign key during Laravel's migration refresh. 0. 0 I have 3 tables. On the Company model's boot. e. 1. –In the database schema, you should define the foreign key with the ON DELETE CASCADE action. I tried to find accompanying docs, but they seem to have left it out. Laravel - How to prevent delete when there is dependent field. 2 delete model with all relations. 2. Teams. This directly conflicts with the Primary Key declaration, which stops it from becoming NULL. 5. The belonging to item always has the pointer to the other table. To add soft delete column in table, first add the following Line of code in your Note Model. events. I an 99,99% sure of the answer however assumption is the mother of all errors so I want to make sure. What would you expect the database to do when a parent record is deleted - delete the child record or update it? Choose the right clause according to your application's logic, e. I understand that there is a onDelete('cascade') option in the schema builder. I have tried the following: ALTER TABLE properties ADD CONSTRAINT fk_properties_user FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE;and some times when inserting values to the relation table: SQLSTATE[23000]: Integrity constraint violation: 1452 Cannot add or update a child row: a foreign key constraint fails (propulse. 2. ** I am using iatstuti/laravel-cascade-soft-deletes so is there any way with this** php; laravel; cascading-deletes; soft-delete; Share. post_id. 0. When we define the database trigger, we will point it to the relevant cluster and parent namespace to monitor and trigger when a document is deleted—in our case, GamesDB. Update Folder Count on cascade delete in Laravel via eloquent. If you are using the SoftDeletes trait, then calling the delete() method on your model will only update the deleted_at field in your database, and the onDelete constraint will not be triggered, given that it is triggered at the database level i. i try to delete data on parent table like id 1 . The migrate:reset command will roll back all of your application's migrations: php artisan migrate:reset. In this series, we'll review and compare all the new features and improvements you can enjoy as part of Laravel 10. We have now completed establishing the relationships and now we can move onto. Hot Network QuestionsON DELETE CASCADE is something I consider pretty dangerous so generally avoid. Laravel 8 - CAN delete but CANNOT UPDATE parent row due to integrity constraints violation: foreign key constraint fails. 4 delete one to many relationship. CASCADE - If the post. 4 cascade not working ( also not working One to many relationship ) for creating REST API. 5. Deleting child model with additional logic. The cascading solves the problem of orphaned records, with this approach you will never have such orphaned records. In this series, we'll demystify much of Laravel's magic for developers who may not understand how all the pieces. If you don't want to delete a specific unused file right away, you can schedule an automatic cleanup of all unused files. 0. Anchor tags are for GET requests. 3. Post hasMany Vehicles. ON UPDATE CASCADE ON DELETE CASCADE means that if the parent is updated or deleted, the changes are cascaded to the child records. posted 9 years ago. I am using the Eloquent plymorphic relations and the ON DELETE CASCADE option of mysql, and am afraid of how my data will stay consistent over time. – Inzamam Idrees. Laravel onDelete('cascade') does not work. I'm trying to delete polymorphic items/relationships when a parent is deleted. I will show you also laravel on delete cascade example and laravel on update cascade example. William shows us how to use Laravel Soft Delete functionality to retain deleted records in our database. This is because the models are never actually retrieved when executing the delete statement. Laravels Soft Deleting allows you to retain deleted records in your database so they can be used or restored at a later point. Laravel advances to version 7 on March 3rd, 2020 with updates to Blade components, custom casting, fluent string operations, a friendly HTTP client, and much more. 2. 0 cascade delete and polymorphic relations. Then, using a battle-tested library called Filepond, we'll provide our Vue component with an area to drag and drop pictures to. Another might delete the parent data by accident. To my understand, in order to do this I need to extend the delete() method on the Image model. Run the following command in your terminal. Learn more about Teams1 Answer. I wonder why Laravel implements polymorphic relationships like that. . 4. #sql-2f78_29d, CONSTRAINT students_standard_id_foreign FOREIGN KEY (standard_id) REFERE NCES standards (id) ON DELETE CASCADE ON UPDATE. id changes, change the comment. In this section, we’ll show how to delete a MongoDB document by configuring the Laravel controller and the route. Deleting a table row in relations with another tables. . Laravel delete in two related tables in the same time. Laravel 5: cascade soft delete. When the accidentally deleted data is restored then the purposefully delete piece of data will also be restored. 0. Entity Framework Core Cascade Delete is one of the Referential actions. provides database agnostic support for creating and manipulating tables across all of Laravel's supported database systems. FOREIGN KEY (foreign_key_columns) REFERENCES parent_table (parent_key_columns) ON UPDATE <action> ON DELETE <action>; See the reference tutorial. Delete on cascade in Model Laravel with eloquent. Pivot Table. Normally you would do it like so. Switch branches/tags. Modified 6 years, 5 months ago. 5. : CREATE TABLE public. n Events. 1. When I delete student data, I want all associated grade data to be deleted. . I need to change this foreign key to ON DELETE CASCADE. Laravel onDelete('cascade') does not work. games. This will automatically delete any records that reference the parent when the parent is deleted. Support the ongoing development of Laravel. Now, when a parent record is deleted, the defined child records will also be deleted. comments,. Masih ada banyak sekali kelebihan Eloquent yang bisa membantu kita dalam mempercepat dan mempermudah pembuatan aplikasi. SectionController@destroy :Laravel Soft Delete with transaction management for the cascaded deletion. 3- Delete Comments related to the Cost. Laravel will be the tool that helps us get there. It is a kind of referential action related to the foreign key. The solution I will use is: 1- Get Ids of Comments that are related to the Post. php model – see in bold:Laravel adding cascade on delete to an existing table. In this example, I will use foreignIdFor() method to define laravel foreign key constraint in laravel migration. The onDelete('cascade') means that when the row is deleted, it will delete all it's references and attached data too. 82. I am using Laravel Eloquent for my project. How to soft delete related records when soft deleting a parent record in Laravel? 2. Laravel will be the tool that helps us get there. You have a row in table B that references a row in table A. Laravel Eloquent to treat the column 'archived_at' like it does 'deleted_at' 0 Laravel blade: How do you delete prepoulated form field data (save in db as null)As of February 14th, 2023, Laravel has now officially bumped to version 10. I'm working on a live laravel website on cPanel and I'd like to update the user_id column on the properties table to be foreignId and onDelete Cascade. Am I doing something wrong? Any better way to make. For example, when you delete a row with building no. When executing a mass delete statement via Eloquent, the deleting and deleted model events will not be fired for the deleted models. I understand that there is a onDelete('cascade') option in the schema builder. This works out because the foreign key constraint ON DELETE CASCADE is specified. 4. 35. Cannot add foreign key constrain on delete cascade. Laravel adding cascade on delete to an existing table. for example in this instance: /** * @return bool|null */ public function delete(): ?bool { $this->profile()->delete(); $this->userInterests()->delete(); $this. The convenience angle is obvious. In this example, we will: Set up some sample data without the On Delete Cascade feature1. assume, If you are using cascade delete, and you are trying to delete the category which is used in the item table, this will delete the category and related item lists in item table. . Deleting a gallery deletes all pictures. That option is part of the preceding FOREIGN KEY constraint definition, and thus appears on the same line without a comma. 4 delete table row and rows from related table. How to Setting cascadeOnDelete on Laravel 8 Eloquent. Install a soft-delete trigger usinge the above archive_record () function. Soft Deletes Laravel – Pada tutorial sebelumnya, saya sudah pernah menyinggung bahwa kelebihan Eloquent belum selesai sampai yang kita pelajari sebelumnya. SET NULL - If you change or delete post. Laravel Soft Cascade is a package that makes it easy to perform soft cascade deletes and restores on related models using soft deleting. Normally, you would use your database's foreign key constraints, adding an ON DELETE CASCADE rule to the foreign key constraint in your comments table. are deleted. Laravel 5. 0. You need to remove all ref to the user in your table Interests_Properties. Laravel 5. Removing default migrations from Laravel. I'll also need to cascade a category deletion through to all the interest_user records. Once done above we need to install the Laravel Collective Package, run the following command below: composer require laravelcollective/html. After that, deleting a City is as simple as: call DeleteCity (5); Share. For example, two customer service agents may be working in a system at the same time. I have also considered a SQL trigger, but it doesnt seem like I can delete files from SQL (inform me if I can, I'd love it! I'm using MySQL, btw). If you're not making use of MySQL InnoDB cascades, you might still want to cause events (such as deleting) on related models to cascade. The new migration will be placed in your database/migrations directory. I'm using MySQL, database engine is innoDB, Laravel version is 5. The cascading solves the problem of orphaned records, with this approach you will never have such orphaned records. 3. 0. *" Quick example. Delete all relation when Deleting a row in laravel. 1 Laravel 4. They have a relationship with category_id as a foreign key to product table, my question is, I need when I delete a category, this category_id related field be NULL, I mean, there's a Laravel way to do it? Without be in migration. Inside this deleting event, you can access the. Hot Network Questions When does SEM have little to no benefit over multiple regression, and there is a distinction without a difference between two approaches?Lúc này, bạn cần tới ON DELETE CASCADE. The essential syntax for a defining a foreign key constraint in a CREATE TABLE or ALTER TABLE statement includes the following:20. Suppose we have created two tables with a FOREIGN KEY in a foreign key relationship, making both tables a parent and child. Laravel Delete Event Listener. Events have an user_id,. composer require askedio/laravel5-soft-cascade ^version In second package: composer require iatstuti/laravel-cascade-soft-deletes Register the service provider in your config/app. There are 2 foreignkey in budget table. execSQL ("PRAGMA foreign_keys=ON"); This turns on support for foreign keys, which is necessary for ON DELETE CASCADE to work properly. How to soft delete related records when soft deleting a parent record in Laravel? 2. Normally, you would use your database’s foreign key constraints, adding. 10. Laravel 4. 4. Source: stackoverflow. 1. Join me as, one topic per episode, we review everything you need to know! Laravel adding cascade on delete to an existing table. 1 Laravel5: Can't delete from DB. The problem occurs because I have two cascading delete path to the CandidateJobMap table: If I delete employer, its going to delete related employer jobs which will in turn delete CandidateJobMap table: Employer->Jobs->CandidateJobMap. 2. My question is related to Laravel, I have product model and categories. Finally select CASCADE option ON DELETE. Laravel 5. 0. If you don't have delete cascade setup, delete productimage first, then product. Force a hard delete on a soft deleted model without raising any events. 1. Your problem is the constraint "article_favorite_user_id_foreign". And one of Eloquent's is not being able to autodelete related objects through SoftDelete when a model has a relationship to another with onDelete('cascade'). If you do not specify cascading deletes, the default behavior of the database server prevents you from deleting data in a table if other tables reference it. Create "*_archived" tables for all tables that inherit the original tables. 2 in the buildings table as the following query:. Collectives™ on Stack Overflow – Centralized & trusted content around the technologies you use the most. ON UPDATE CASCADE means that if a parent primary key is updated, the child records are updated as well. Use the ON DELETE CASCADE option to specify whether you want rows deleted in a child table when corresponding rows are deleted in the parent table. This version of our popular Laravel From Scratch series was recorded in 2021, and uses Laravel 8. I optionally can associate a AppTask with it. 1. User hasMany Posts.