Hello,

I want to create a favorites option for something I am working on. I have two tables. The main table where the posts are kept called "place".

+---------+--------------+------+-----+-------------------+----------------+
| Field   | Type         | Null | Key | Default           | Extra          |
+---------+--------------+------+-----+-------------------+----------------+
| id      | int(11)      | NO   | PRI | NULL              | auto_increment | 
| name    | varchar(30)  | YES  |     | NULL              |                | 
| userid  | int(3)       | YES  |     | NULL              |                | 
| address | varchar(300) | YES  |     | NULL              |                | 
| desc    | varchar(550) | YES  |     | NULL              |                | 
| phone   | int(15)      | YES  |     | NULL              |                | 
| image   | varchar(50)  | YES  |     | NULL              |                | 
| website | varchar(100) | YES  |     | NULL              |                | 
| cat     | varchar(25)  | YES  |     | NULL              |                | 
| date    | timestamp    | NO   |     | CURRENT_TIMESTAMP |                | 
+---------+--------------+------+-----+-------------------+----------------+

and the favorite table called "wait"

+---------+-----------+------+-----+-------------------+----------------+
| Field   | Type      | Null | Key | Default           | Extra          |
+---------+-----------+------+-----+-------------------+----------------+
| id      | int(11)   | NO   | PRI | NULL              | auto_increment | 
| userid  | int(11)   | YES  |     | NULL              |                | 
| place_id | int(11)   | YES  |     | NULL              |                | 
| date    | timestamp | NO   |     | CURRENT_TIMESTAMP |                | 
+---------+-----------+------+-----+-------------------+----------------+

I am using codeigniter and displaying the data on the home page like this.

<? foreach ($places as $place): ?>
      <? echo $place->title; ?>
      <a href="#" id="addfav">Add to favorites</a>  <----- This sends the user's id and place id to wait table. I want to display this if the current user hasn't clicked on it already. 
      <? endforeach; ?>
I tried something like this:

$query_str ="select place.id, place.name, place.desc, wait.userid, users.username 
from place left join wait on place.id=wait.chat_id 
left join users on place.userid=users.id";

I am also querying the users table to get the user who created the post. Not too familiar with joins so any help is appreciated. I only have two posts and two users at the moment and if both users favorite each post, the foreach displays four posts instead of two.

Hello,

The first thing I can see is the wait table does not have a field called chat_id so the join will fail there.

This is what was suggested and it works. Just in case anyone has the same problem.

create table users (id serial, name varchar(255) not null);
create table posts (id serial, user_id bigint unsigned not null, context text not null);
create table saved_posts (post_id bigint unsigned not null, user_id bigint unsigned not null, unique key (post_id,user_id));
select a.*,b.user_id from posts a left outer join saved_posts b on a.id=b.post_id and b.user_id=67;