用lodash查找null屬性

Question

我有一個對象，我需要檢查一個屬性是否爲null，但總是得到undefined。

var obj={ 
    "EMPRESA": "CMIP", 
    "CD_DIRECAO": "01", 
    "DT_INI_DIRECAO": "1900-01-01", 
    "CD_DEPT": "10", 
    "DT_INI_DEPT": "1900-01-01", 
    "CD_PROC": "1", 
    "DT_INI_PROC": "1900-01-01", 
    "DSP_PROC": "Processo 1", 
    "DSR_PROC": "Processo 1", 
    "DESCRICAO": null, 
    "ID_PROCESSO_ARTIGO": null, 
    "VALIDACAO_ARTIGO": null, 
    "DT_FIM": null, 
    "DT_RowId": "row_CMIP011900-01-01101900-01-0111900-01-01", 
    "DESIGEMPRESA": "CMIP", 
    "DSP_DIRECAO": "Disponivel", 
    "DSP_DEPT": "ADM - Administracao" 
}; 
console.log(_.find(obj,{'DT_FIM':null})); 

我設置一個小提琴https://jsfiddle.net/0a6yf34b/1/

Answer 1

對於孔對象包含null ATTR

_.chain(obj).values().includes(null).value(); 

對於某些ATTR

_.isNull(obj['DT_FIM']); 

你瓦里安

_.find(obj,{'DT_FIM':null}) 

將嵌套對象的工作就像

var obj={ 
    ... 
    "DT_FIM": {"DT_FIM":null}, 
    ... 
}; 

對於所有空ATTRS

_.reduce(obj, function(res, val, key) { 
    if (_.isNull(val)) { 
     res.push(key); 
    };  
    return res; 
}, []) 

對於第一個空ATTR

_.findKey(obj, _.isNull)