如果匹配，如何比较json元素并在多维数组中显示数据？

Question

我有一个 JSON 对象可供我使用，如下所示：

{
      "Fields": [
    {
      "table": "catalogue",
      "field": "Histo_Qtite",
      "type": "STRING"
    },
    {
      "table": "catalogue",
      "field": "id_article",
      "type": "STRING"
    },
    {
      "table": "contact",
      "field": "contact_email",
      "type": "STRING"
    },
    {
      "table": "contact",
      "field": "contact_firestname",
      "type": "STRING"
    },
    {
      "table": "customer",
      "field": "activity_type",
      "type": "STRING"
    },
    {
      "table": "customer",
      "field": "adress",
      "type": "STRING"
    }
  ],
  "Tables": [
    {
      "entity": "CATALOGUE",
      "table": "catalogue"
    },
    {
      "entity": "CLIENT",
      "table": "customer"
    },
    {
      "entity": "CONTACT",
      "table": "contact"
    }
  ]
}

我正在尝试根据表的名称为每个“字段”对象创建一个多维数组。为此，我尝试了 javascript，并产生了以下代码：

var objectPREFIX = "object_",
selectedObject = '',
objectArray = [],
objectImport = [],
OFImport = [],
TablesLength = jsonImport.Tables.length,
FieldsLength = jsonImport.Fields.length;

 for (i = 0; i < FieldsLength; i++) {

    selectedObject = objectPREFIX + jsonImport.Fields[i].table;

    OFImport[selectedObject] = {
        tableName : jsonImport.Fields[i].table,
        FieldName : jsonImport.Fields[i].field,
        fieldType : jsonImport.Fields[i].type
    }

    for (j = 0; j < TablesLength; j++) {

        if(OFImport[selectedObject].tableName == jsonImport.Tables[j].table) {

            objectImport.push(OFImport[selectedObject]);
            objectArray[selectedObject] = OFImport[selectedObject];
        }
    }
}

console.log(objectArray);

据我了解，问题是OFImport[selectedObject] 包含“字段”的每个对象迭代，并且仅在控制台中显示最后一个对象。

我想知道如何在“字段”和“表”之间进行比较条件，以将每次迭代都放在单独的数组中。

这是一个证明问题的FIDDLE（抱歉，如果我无法清楚地表达我的解释）。

Answer 1

如果我了解您想要做什么，即拥有一组表，其中包含一组字段，那么我认为您的 for 向后循环。

你需要先循环你的表格，然后像这样添加你的字段：-

jsonImport = {
  "Fields": [{
    "table": "catalogue",
    "field": "Histo_Qtite",
    "type": "STRING"
  }, {
    "table": "catalogue",
    "field": "id_article",
    "type": "STRING"
  }, {
    "table": "contact",
    "field": "contact_email",
    "type": "STRING"
  }, {
    "table": "contact",
    "field": "contact_firstname",
    "type": "STRING"
  }, {
    "table": "customer",
    "field": "activity_type",
    "type": "STRING"
  }, {
    "table": "customer",
    "field": "adress",
    "type": "STRING"
  }],
  "Tables": [{
    "entity": "CATALOGUE",
    "table": "catalogue"
  }, {
    "entity": "CLIENT",
    "table": "customer"
  }, {
    "entity": "CONTACT",
    "table": "contact"
  }]
}

var objectArray = [],
    objectPREFIX = "object_",
    selectedObject = '',
    TablesLength = jsonImport.Tables.length,
    FieldsLength = jsonImport.Fields.length;

for (i = 0; i < TablesLength; i++) {

  selectedObject = objectPREFIX + jsonImport.Tables[i].table;
  
  objectArray[selectedObject] = {
    table: jsonImport.Tables[i].table,
    entity: jsonImport.Tables[i].entity,
    Fields: []
  }

  for (j = 0; j < FieldsLength; j++) {

    if (jsonImport.Tables[i].table == jsonImport.Fields[j].table) {

      objectArray[selectedObject].Fields.push({
        "field": jsonImport.Fields[j].field,
        "type": jsonImport.Fields[j].type
      });
    }
  }
}

console.log(objectArray);

输出：-