Codeigniter active record left join issue
Solution 1
You could alias them:
$this->db->select('accounts_transatctions.*, account_transactions.id AS a_id,
accounts_bills_transactions.*,
account_bills_transactions.id AS ab_id');
$this->db->from('accounts_transactions');
$this->db->join('accounts_bills_transactions', 'accounts_transactions.id = accounts_transactions.transaction_id','left');
$query = $this->db->get();
The two IDs will now be available as a_id
and ab_id
(or whatever alias you choose)
Note: I'm not sure if you can alias in AR without avoiding escaping (haven't been using CI for a while). Should you get any error for that reason, just pass false
as second parameter of $this->db->select()
:
$this->db->select('...', false);
Solution 2
you can try this if you confuse of using $this->where or $this->join
$query = $this->db->query("select ......");
return $query;
Solution 3
You problem is so simple. You can use this query
$query = $this->db
->select('at.*')
->select('abt.id as abt_id');
->from('accounts_transactions at');
->join('accounts_bills_transactions abt', 'at.id = abt.transaction_id','left');
->get()
->result();
When same column are used in join it selects only one. You need to give alise to the other column in second table. The best practice is to use a structure like this
accounts_transatctions
--------------------------
accounts_transatctions_id
other_columns
accounts_bills_transactions
---------------------------
accounts_bills_transactions_id
accounts_transatctions_id
other_columns
Comments
-
Jinu Joseph Daniel over 3 years
I have two tables 'accounts_transactions' and 'accounts_bills_transactions'. I have to left join these two using active record of codeigniter.But the names of key columns used to join are different.So I am not getting the key column from the left table in the output .What query should I write to get the key column from the left table included in the result. My code is
$this->db->select('*'); $this->db->from('accounts_transactions'); $this->db->join('accounts_bills_transactions', 'accounts_transactions.id = accounts_bills_transactions.transaction_id','left'); $query = $this->db->get();
So, as you see the key columns used to join here are , id from left table and transaction_id from second table.The problem is that I am not getting the id from left table in the result.But I am getting all other columns.I assume the problem is because of difference in column names used to join.ie both the column names are not named 'id' .So how can I get the id from left table included in the result.
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Damien Pirsy over 10 yearsYou could try listing all the columns in your select. Are you sure, also, that your query is fine? I mean, maybe you don't want a LEFT join...
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Jinu Joseph Daniel over 10 yearsI strictly need left join :)