在react native中获取类型错误未定义的对象?

我试图在render()中输出数据,但是我得到了一个错误,为什么?

代码:

render() {

        let marketing_plan_projects = [];

        marketing_plan_projects = this.props.markets.data ? this.props.markets.data : null;
        let marketing_updates = get_marketing_updates_from_projects(marketing_plan_projects);

        console.log(marketing_updates);

        return (
            <ScrollView style={styles.container}>

                <Text>{marketing_updates[0].project_name}</Text>

            </ScrollView>
        );
    }

我也试过这个:(仍然给出错误)

<Text>{marketing_updates ? marketing_updates[0].project_name: ""}</Text>

console.log(更新)是:

我收到以下错误: