Codeigneitor数据未插入数据库

Question

我有创建表单，我正在尝试使用Ajax存储数据。但数据未插入数据库。可能是error.user_id将自动增加。而且我想验证sitename.it应该限制插入相同的网站名称。

这是我的代码

控制器

public function user_add()
    {
                $data_save = array(

                    "Mnumber" => $this->input->post("Mnumber"),
                    "email" => $this->input->post("email"),
                    "fname" => $this->input->post("fname"),
                    "address" => $this->input->post("address"),
                    "sitename" => $this->input->post("sitename"),
                    "title" => $this->input->post("title"),
                    "descr" => $this->input->post("descr")

                );
                if ($this->user_mod->AddUser($data_save)) {
                    echo "Successfully Saved";
                } else {
                    echo "error";
                }

        }
    }

模型

class user_mod extends CI_Model
{

    public function AddUser($data_save)
    {
        if ($this->db->insert('users', $data_save)) {
            return true;
        } else {
            return false;
        }

    }
}

查看

<script>
    function save_user_new() {
        var user_id = $('#user_id').val();
        var Mnumber = $('#Mnumber').val();
        var email = $('#email').val();
        var fname = $('#fname').val();
        var address = $('#address').val();
        var sitename = $('#sitename').val();
        var title = $('#title').val();
        var descr = $('#descr').val();


        if (sitename != "" && Mnumber != "") {
            $.ajax({
                type: "post",
                async: false,
                url: "<?php echo site_url('form_con/user_add'); ?>",
                data: { "user_id": user_id,
                    "Mnumber": Mnumber,
                    "email": email,
                    "fname": fname,
                    "address": address,
                    "sitename": sitename,
                    "title": title,
                    "descr": descr,

                },
                dataType: "html",
                success: function (data) {
                    if (data == 'error') {
                        $('#success_msg').hide();
                        $('#error_msg1').show();
                        $('#error_msg1').html("Error : Something wrong.");

                    } else if (data == 'have') {
                        $('#success_msg').hide();
                        $('#error_msg1').show();
                        $('#error_msg1').html("Error : This Employee is already exists.");
                    } else {
                        $('#error_msg1').hide();
                        $('#success_msg').show();
                        $('#success_msg').html("Entitled leave successfully saved.");
                        $('#load_leave').html(data);
                    }

                }

            });
        } else {
            $('#success_msg').hide();
            $('#error_msg1').show();
            $('#error_msg1').html("Error : Please enter Employee Details.");
        }
    }
</script>

<form action="#">

                    <div class="form-body">
                        <div class="form-group">
                            <label class="control-label">Your First Name</label>
                            <input type="text" class="form-control" id="fname" name="fname" placeholder="Enter text">
                            <!--<span class="help-block"> A block of help text. </span>-->
                        </div>

                        <div class="form-group">
                            <label class="control-label">Email Address</label>
                            <div class="input-group">
                                <span class="input-group-addon">
                                    <i class="fa fa-envelope"></i>
                                 </span>

                                <input type="email" class="form-control" id="email" name="email" placeholder="Email Address">
                            </div>
                        </div>

                        <div class="form-group">
                            <label class="control-label">Your Mobile Number</label>
                            <input type="text" class="form-control" id="Mnumber" name="Mnumber" placeholder="Enter text">
                            <!--<span class="help-block"> A block of help text. </span>-->
                        </div>

                        <div class="form-group">
                            <label class="control-label">Your Address</label>
                            <input type="text" class="form-control" id="address" name="address" placeholder="Enter text">
                        </div>

                        <div class="form-group">
                            <label class="control-label">Your Site Name</label>
                            <input type="text" class="form-control" id="sitename" name="sitename" placeholder="Enter text">
                            <!--<span class="help-block"> A block of help text. </span>-->
                        </div>

                        <div class="form-group">
                            <label class="control-label">Title of Your Web site</label>
                            <input type="text" class="form-control" id="title" name="title" placeholder="Enter text">
                        </div>

                        <div class="form-group">
                            <label class="control-label">Description of Your Web Site</label>
                            <input type="text" class="form-control" id="descr" name="descr" placeholder="Enter text">

                        </div>

                    </div>
                    <div class="form-actions right">
                        <button type="submit" class="btn green" onclick="save_user_new()">Submit</button>
                        <button type="button" class="btn default">Cancel</button>
                    </div>
                </form>