为什么显示不刷新这个rebol listview？

Question

我在列表视图中显示来自mysql的垃圾邮件列表，删除后我使用show grid但它不刷新，为什么？

do http://reboltutorial.com/source/mysql-protocol.r 
do http://www.hmkdesign.dk/rebol/list-view/list-view.r 

window: layout [ 
    grid: list-view 500x400 with [ 
    data-columns: ["ID" "Author" "comment_author_IP"] 
    viewed-columns: ["ID" "Author" "comment_author_IP"] 
    data: read/custom mysql://johndoe:123@72.64.23.123/wordpress_db [ 
     "SELECT DISTINCT COMMENT_ID, comment_author,comment_author_IP from wp_1_comments WHERE comment_approved='spam'" 
    ] 
    ] 
    Button 200x30 "Delete all spams" [ 
     read/custom mysql://johndoe:123@72.64.23.123/wordpress_db [ 
     "DELETE FROM wp_1_comments WHERE comment_approved='spam'" 
    ] 
    Print "Spams deleted." 
    show grid ;SHOULD refresh the grid BUT DOESN'T 
    ] 
] 
view/title window "All Rebol Tutorial's Spams" 

Answer 1

http://www.hmkdesign.dk/rebol/list-view/docs/list-view.html#section-13

尝试

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