Rails json找到空字段

Question

我有一些 JSON。我怎样才能得到不为空的“价值”字段？我只想得到"value": "sun-icon" 和"value": "terracotta"

{
    "line_items": [{
        "properties": [{
                "name": "Customization Cost",
                "value": ""
            },
            {
                "name": "Standard Bundle Label 1",
                "value": "sun-icon"
            },
            {
                "name": "Custom Bundle Label 1",
                "value": ""
            },
            {
                "name": "Bundle Color 1",
                "value": "terracotta"
            }
        ]
    }]
}

Answer 1

我会这么说

json = JSON.parse(my_str)

json['line_items'].map{|hsh| hsh['properties'].select{|hsh2| hsh2['value'].empty?}}.flatten.compact