函数应返回字符串的承诺,但不返回

因为 upload_stream 不返回承诺,如果你想做的是先决的,试试这个:

export async function uploadImage(file: any, location: string, next: any): Promise<string> {
    return new Promise((resolve, reject) => {
        try {
            if (!file) {
                reject(new Error("No Image file"));
            }
            const id = location + "/" + utilities.generatePushID();
            const options = {
                resource_type: "raw",
                public_id: id,
            };
            return cloudinary.uploader.upload_stream(options, (error: any, result: any) => {
                if (error) {
                    reject(new Error("Couldn't upload"));
                }
                result(result.public_id);
            }).end(file.buffer);
        } catch (err) {
            reject(InternalError(err));
        } 
    });
}

摆脱 next 因为它看起来像是一个回调,所以您可以这样调用它:

const public_id = await uploadImage(...);
// or
uploadImage(...).then(public_id => console.log(public_id)).catch(() => console.error);

当做。