Question

我有一个CSV文件，如：

FN        |  MI  |  LN      |  ADDR          |  CITY      |  ZIP     |  GENDER
------------------------------------------------------------------------------
Patricia  |      |  Faddar  |  7063 Carr xxx |  Carolina  |  00979-7033 | F
------------------------------------------------------------------------------
Lui       |  E   |  Baves   |  PO Box xxx    |  Boqueron  |  00622-1240 | F
------------------------------------------------------------------------------
Janine    |  S   |  Perez   |  25 Calle xxx  |  Salinas   |  00751-3332 | F
------------------------------------------------------------------------------
Rose      |      |  Mary    |  229 Calle xxx |  Aguadilla |  00603-5536 | F

我将它导入OrientDB，如：

{
  "source": { "file": { "path": "/sample.csv" } },
  "extractor": { "csv": {} },
  "transformers": [
    { "vertex": { "class": "Users" } }
  ],
  "loader": {
    "orientdb": {
       "dbURL": "plocal:/orientdb/databases/test",
       "dbType": "graph",
       "classes": [
         {"name": "Users", "extends": "V"}
       ]
    }
  }
}

我想设置导入，以便它创建属性，以便FN变为first_name，MI变为middle_name等等，并设置一些值小写。例如：Carolina成为carolina

添加数据后，我可能会从SCHEMA进行此更改。我这样做的原因是我有多个CSV文件，我想为所有

保持相同的模式

有什么想法吗？

编辑：解决方案基于Roberto Franchini的回答

{
    "source": { "file": { "path": "/sample.csv" } },
    "extractor": { 
        "csv": {
            "columns": ["first_name:string", "middle_name:string", "last_name:string", "address:string", "city:string", "zip:string", "zip_four:string", "gender:string"]
        } 
    },
    "transformers": [
        { 
            "vertex": { "class": "User" }
        },
        {
            "field": { "fieldName": "first_name", "expression": "$input.first_name.toLowerCase()" }
        },
        {
            "field": { "fieldName": "address", "expression": "$input.address.toLowerCase()" }
        },
        {
            "field": { "fieldName": "gender", "expression": "if(($input.gender === 'F'), 'female', 'male')" }
        }
    ],
    "loader": {
        "orientdb": {
        "dbURL": "plocal:/orientdb/databases/test",
        "dbType": "graph",
        "classes": [
                { "name": "User", "extends": "V" }
            ]
        }
    }
}

Answer 1

要重命名字段，请查看Field变换器：

http://orientdb.com/docs/last/Transformer.html#field-transformer

将字段从salary重命名为renumeration：

  { "field": 
    { "fieldName": "remuneration", 
      "expression": "salary"
    } 
  },
  { "field": 
    { "fieldName": "salary", 
      "operation": "remove"
    } 
  }

以同样的方式，您可以将lowerCase函数应用于属性

{field: {fieldName:'name', expression: '$input.name.toLowerCase()'}}

尝试一下，让我知道它是否有效。

如何在OrientDB中设置CSV导入属性？

1 个答案: