coerce

编辑

`coerce`

编辑

数据并不总是干净的。根据数据的生成方式，数字可能在 JSON 主体中呈现为真正的 JSON 数字，例如 5，但也可能呈现为字符串，例如 "5"。或者，一个应该是整数的数字可能会呈现为浮点数，例如 5.0，甚至 "5.0"。

强制转换尝试清理脏值以使其符合字段的数据类型。例如

字符串将被强制转换为数字。
浮点数将被截断为整数值。

例如

resp = client.indices.create(
    index="my-index-000001",
    mappings={
        "properties": {
            "number_one": {
                "type": "integer"
            },
            "number_two": {
                "type": "integer",
                "coerce": False
            }
        }
    },
)
print(resp)

resp1 = client.index(
    index="my-index-000001",
    id="1",
    document={
        "number_one": "10"
    },
)
print(resp1)

resp2 = client.index(
    index="my-index-000001",
    id="2",
    document={
        "number_two": "10"
    },
)
print(resp2)

response = client.indices.create(
  index: 'my-index-000001',
  body: {
    mappings: {
      properties: {
        number_one: {
          type: 'integer'
        },
        number_two: {
          type: 'integer',
          coerce: false
        }
      }
    }
  }
)
puts response

response = client.index(
  index: 'my-index-000001',
  id: 1,
  body: {
    number_one: '10'
  }
)
puts response

response = client.index(
  index: 'my-index-000001',
  id: 2,
  body: {
    number_two: '10'
  }
)
puts response

const response = await client.indices.create({
  index: "my-index-000001",
  mappings: {
    properties: {
      number_one: {
        type: "integer",
      },
      number_two: {
        type: "integer",
        coerce: false,
      },
    },
  },
});
console.log(response);

const response1 = await client.index({
  index: "my-index-000001",
  id: 1,
  document: {
    number_one: "10",
  },
});
console.log(response1);

const response2 = await client.index({
  index: "my-index-000001",
  id: 2,
  document: {
    number_two: "10",
  },
});
console.log(response2);

PUT my-index-000001
{
  "mappings": {
    "properties": {
      "number_one": {
        "type": "integer"
      },
      "number_two": {
        "type": "integer",
        "coerce": false
      }
    }
  }
}

PUT my-index-000001/_doc/1
{
  "number_one": "10" 
}

PUT my-index-000001/_doc/2
{
  "number_two": "10" 
}

	`number_one` 字段将包含整数 `10`。
	由于禁用了强制转换，此文档将被拒绝。

可以使用更新映射 API更新现有字段上的coerce设置值。

索引级默认值

编辑

可以在索引级别设置 index.mapping.coerce 设置，以全局禁用所有映射类型的强制转换

resp = client.indices.create(
    index="my-index-000001",
    settings={
        "index.mapping.coerce": False
    },
    mappings={
        "properties": {
            "number_one": {
                "type": "integer",
                "coerce": True
            },
            "number_two": {
                "type": "integer"
            }
        }
    },
)
print(resp)

resp1 = client.index(
    index="my-index-000001",
    id="1",
    document={
        "number_one": "10"
    },
)
print(resp1)

resp2 = client.index(
    index="my-index-000001",
    id="2",
    document={
        "number_two": "10"
    },
)
print(resp2)

response = client.indices.create(
  index: 'my-index-000001',
  body: {
    settings: {
      'index.mapping.coerce' => false
    },
    mappings: {
      properties: {
        number_one: {
          type: 'integer',
          coerce: true
        },
        number_two: {
          type: 'integer'
        }
      }
    }
  }
)
puts response

response = client.index(
  index: 'my-index-000001',
  id: 1,
  body: {
    number_one: '10'
  }
)
puts response

response = client.index(
  index: 'my-index-000001',
  id: 2,
  body: {
    number_two: '10'
  }
)
puts response

const response = await client.indices.create({
  index: "my-index-000001",
  settings: {
    "index.mapping.coerce": false,
  },
  mappings: {
    properties: {
      number_one: {
        type: "integer",
        coerce: true,
      },
      number_two: {
        type: "integer",
      },
    },
  },
});
console.log(response);

const response1 = await client.index({
  index: "my-index-000001",
  id: 1,
  document: {
    number_one: "10",
  },
});
console.log(response1);

const response2 = await client.index({
  index: "my-index-000001",
  id: 2,
  document: {
    number_two: "10",
  },
});
console.log(response2);

PUT my-index-000001
{
  "settings": {
    "index.mapping.coerce": false
  },
  "mappings": {
    "properties": {
      "number_one": {
        "type": "integer",
        "coerce": true
      },
      "number_two": {
        "type": "integer"
      }
    }
  }
}

PUT my-index-000001/_doc/1
{ "number_one": "10" } 

PUT my-index-000001/_doc/2
{ "number_two": "10" }

	`number_one` 字段覆盖索引级别的设置以启用强制转换。
	由于 `number_two` 字段继承了索引级别的强制转换设置，此文档将被拒绝。

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