微信发送群发消息openid的size问题

调用微信的群发消息的时候一直遇到一个问题,如下

{
    "errcode"=>40130,
    "errmsg"=>"invalid openid list size, at least two openid hint: [i..dUA0888ge10]"
}

问题详情

一开始测试的参数形式是:

 { touser: ['openid_1', 'openid_2', 'openid_3'], msgtype: 'text', text: { content: '测试'}}

然后调用方法如下:

    # 发送文本消息
    def self.send_bai_e_ke_cheng(_open_ids)
      access_token = get_access_token //这个get_access_token要自己写,是获取access_token的方法。
      uri = "https://api.weixin.qq.com/cgi-bin/message/mass/send?access_token=#{access_token}"
      json_params = { touser: ['openid_1', 'openid_2', 'openid_3'], msgtype: 'text', text: { content: '测试'}}
      result = JSON.parse(RestClient.post(uri, json_params))
      return result
    end

接下来在console里边调用的时候,一直报

{"errcode"=>40130, "errmsg"=>"invalid openid list size, at least two openid hint: [IsGYja0367age1]"}

之后通过在线接口的测试和对参数的转换,发现只要把参数转成json就行了:

{"errcode"=>40130, "errmsg"=>"invalid openid list size, at least two openid hint: [IsGYja0367age1]"}.to_json

console退出,然后再尝试调用,成功,返回信息如下:

{"errcode"=>0, "errmsg"=>"send job submission success", "msg_id"=>2568957780}

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