错误：“字段列表”中的未知列“ Array”（codeigniter）

Question

I am getting this error

Unknown column 'Array' in 'field list'

When inserting checkbox list into database. When I do print_array I am getting this result :

Array
(
    [0] => Array
        (
            [user_id] => 3
            [project_id] => 10
            [project_type] => 5
            [project_list] => Array
                (
                    [0] => 17
                    [1] => 18
                )

        )

)

The project_list value supposed to be inserted into a new row in the database.

my view : <input type="checkbox" value="<?php echo $project_list['id']; ?>" name="project_list[]"> which is populated from database.

my controller : $this->Project_module->createProject($_POST['project_list']);

my module

public function createProject($project_list){

    if($project_list != null){

        $data = array();

        foreach($project_list as $project_list){
            $data[] = array(
                'user_id'          => $this->getUserId(),
                'project_id'       => $this->getProjectId(),
                'project_type'     => $this->getProjectType(),
                'project_list'     => $this->getProjectList(),
            );
        }

        $this->db->insert_batch('tblProject', $data);

        if($this->db->affected_rows()){
            return true;
        } else {
            return false;
        }

    } 

}

EDIT I was edited my foreach like this

foreach($project_list as $row){
    $data = array(
        'user_id'          => $this->getUserId(),
        'project_id'       => $this->getProjectId(),
        'project_type'     => $this->getProjectType(),
        'project_list'     => $this->getProjectList(),
    );
}

But I am still getting the same error.

Answer 1

Linundus, you need to name the array alias in the foreach something different. You have

foreach ($project_list as $project_list)

you need to have something like this:

foreach($project_list as $list)

Answer 2

You already pass the project_list So you don't want to get the list again. And you can store the just foreach string. In my side confusion with $data and $data[] So test with both and let me know.... Please check before with Table fields are correct

public function createProject($project_list){

    if($project_list != null){

        $data = array();

        foreach($project_list as $row){
            $data[] = array(
                'user_id'          => $this->getUserId(),
                'project_id'       => $this->getProjectId(),
                'project_type'     => $this->getProjectType(),
                'project_list'     => $row,
            );
        }

        $this->db->insert_batch('tblProject', $data);

        if($this->db->affected_rows()){
            return true;
        } else {
            return false;
        }

    } 

}

Answer 3

I have solved the problem and here is my coding that working fine now.

ERROR CAUSE

In the controller I have already set the checkbox setter like this :

$this->Project_module->setProjectList($this->input->post('project_list'));

and then call the createProject function after like this :

$this->Project_module->createProject($_POST['project_list']);

So I am getting error with the foreach inside my module.

SOLUTION

In controller

1. Remove this line

   $this->Project_module->setProjectList($this->input->post('project_list'));

2. Simply hold all checkbox value in line

   $this->Project_module->createProject($_POST['project_list']);

And in module

public function createProject($project_list){   // $_POST['project_list'] value pass in $project_list

    if($project_list != null){

        $data = array();

        foreach($project_list as $row){         // Do foreach to insert every value in different rows in database
            $data[] = array(
                'user_id'          => $this->getUserId(),
                'project_id'       => $this->getProjectId(),
                'project_type'     => $this->getProjectType(),
                'project_list'     => $row,
            );
        }

        $this->db->insert_batch('tblProject', $data);

        if($this->db->affected_rows()){
            return true;
        } else {
            return false;
        }

    } 

}

Answer 4

Array
(
    [0] => Array
        (
            [user_id] => 3
            [project_id] => 10
            [project_type] => 5
            [project_list] => Array
                (
                    [0] => 17
                    [1] => 18
                )

        )

)

your value is in a nested key 0 so if you want to access project_id you'll have to use $array[0]['project_id']

a suggestion here would be to you check if values inside key 0 exist then do print