====JSON格式====
^名称  ^类型   ^注释 ^
|id 			|int  		|自定义字段id，系统自动分配 |
|url			|varchar	|自定义字段的资源url |
|name		|varchar	|自定义字段名字|
|key			|varchar  	|自定义字段的唯一标识|
|type		|int		|自定义字段类型，取值为：1-下拉列表，2-单行文本，3-多行文本，4-正整数，5-小数，6-复选框，7-正则表达式，8-日期(格式为：2018-02-03)，11-表单，12-附件，13-评星，14-高级复选框，15-商品表，16-满意度评价表，17-电话类型的文本|
|isRequired	|tinyint  	|是否必选，取值为：1-非必选，0-必选|
|isReadonly	|tinyint	|是否只读，取值为：1-只读，0-可编辑|
|readonly_range |int	|只读范围，只有isReadonly取值为1时，该参数才生效。取值为：1-所有客服，2-客服分组，3-客服，4-当前用户。|
|readonly_support |varchar	|当只读范围是某个客服时，该参数是客服id；当只读范围是某个客服分组时，该参数是客服分组id。|
|custom_field_options |array |下拉列表的选项，如果字段类型是下拉列表，该字段会有值。|
|custom_field_table |array |表单的列，如果字段类型是表单或商品表单，该字段会有值。|
 
====JSON示例====
{
     "id": 1,
     "url": "https://www.bangwo8.com/api/v1/tickets/ticket_fields/1.json",
     "name": "产品类型",
     "key": "field_10",
     "type": "1",
     "isRequired": "0",
     "isReadonly": "0",
     "readonly_range": "1",
     "readonly_support": "231",
     "custom_field_options": [//key为下拉选项的ID
       {
         "key": "231",
         "value": "在线客服模块"
       },
       {
         "key": "232",
         "value": "呼叫中心模块"
       },
       {
         "key": "233",
         "value": "工单模块"
       }
    ]
    "table_columns": [//key为字段的唯一标识
       {
         "key": "pinming",
         "value": "品名"
       },
       {
         "key": "xinghao",
         "value": "型号"
       },
       {
         "key": "danjia",
         "value": "单价"
       },
       {
         "key": "shuliang",
         "value": "数量"
       },
       {
         "key": "zongjia",
         "value": "总价"
       }
    ]
}

====查询工单自定义字段列表====
<code>
GET /api/v1/tickets/ticket_fields.json
</code>

**调用者权限**
  所有客服
  
**调用示例**
<code>
curl https://www.bangwo8.com/api/v1/tickets/ticket_fields.json -u {account}:{password}
</code>

**返回值示例**
<code>
Status: 200 OK

{
  "ticket_fields":[
   {
    "id": 1,
    "name": "产品类型",
    "key": "field_10",
    "type": "1",
    "isRequired": "0",
    "isReadonly": "0",
    "readonly_range": "1",
    "readonly_supportgroup": "231",
    "custom_field_options": [
      {
       "key": "231",
       "value": "在线客服模块"
      },
      {
       "key": "232",
       "value": "呼叫中心模块"
      },
      {
       "key": "233",
       "value": "工单模块"
      }
     ]
    },
    {
     "id": 21,
     "name": "商品明细表",
     "key": "field_8",
     "type": "15",
     "isRequired": "",
     "isReadonly": "",
     "readonly_range": "",
     "readonly_supportgroup": "",
     "custom_field_options": [
     ],
     "custom_field_table": [
         {
            "key": "pinming",
            "value": "品名"
        },
        {
            "key": "xinghao",
            "value": "型号"
        },
        {
            "key": "danjia",
            "value": "单价"
        },
        {
            "key": "shuliang",
            "value": "数量"
        },
        {
            "key": "zongjia",
            "value": "总价"
        }
     ]
    },
    ...
  ]
}
</code>