Sequelize Where if not null

Question

假设我想做一个选择命令

WHERE ID=2134

但是如果用户没有提供 ID，那么它不应该打扰 WHERE ID（因为它是空的）

如何使用 Sequelize 处理这个问题？

Answer 1

基本上你的查询应该有

WHERE fk_id=1234 OR fk_id is null

所以为了sequilize它会

const Op = Sequelize.Op;

Model.findAll({
   where: {
      fk_id: {
        [Op.or]: [1234, null]
      }
   }
});

这是文档： http://docs.sequelizejs.com/manual/tutorial/querying.html#operators

Answer 2

Post.update({
  updatedAt: null,
}, {
  where: {
    deletedAt: {
      [Op.ne]: null
    }
  }
});

Answer 3

好的，我想我问错了这个问题。所以如果提供了id参数，当我们返回这个id过滤的结果时，如果不是返回所有结果。 像这样的

function getData(dataId) {
  let conditions = {};

  if (dataId) {
    conditions.where = { id: dataId };
  }

  return Model.findAll(conditions);
}

// The record with id = 1234
getData(1234).then(function(record) {
  // record readed here
});

// All records
getData().then(function(records) {
  // record readed here
});

Answer 4

我读了标题，上面写着，如果不为空的话。但是，我显示 IS NOT NULL 和 IS NULL

我附上一个例子。

    const cars = await Car.findAll({
    where: {
        userId: {
            [Op.in]: myUserIds, // array like userId IN [2, 3, 4]
        },
        action: 'start', // like: action = 'start'
        sellDate: {
            [Op.not]: null, // Like: sellDate IS NOT NULL
        },
        status: {
            [Op.is]: null, // Like: status IS NULL
        }
    },
    order: [
        ['id', 'DESC'] // Like: ORDER BY id DESC
    ],
    limit: 5, 
    offset: 1
});

详情我附上文件 node_modules/sequelize/types/lib/operators.d.ts

希望对你有帮助。

/**
 * object that holds all operator symbols
 */
declare const Op: {
  /**
   * Operator -|- (PG range is adjacent to operator)
   *
   * ```js
   * [Op.adjacent]: [1, 2]
   * ```
   * In SQL
   * ```sql
   * -|- [1, 2)
   * ```
   */
  readonly adjacent: unique symbol;
  /**
   * Operator ALL
   *
   * ```js
   * [Op.gt]: {
   *  [Op.all]: literal('SELECT 1')
   * }
   * ```
   * In SQL
   * ```sql
   * > ALL (SELECT 1)
   * ```
   */
  readonly all: unique symbol;
  /**
   * Operator AND
   *
   * ```js
   * [Op.and]: {a: 5}
   * ```
   * In SQL
   * ```sql
   * AND (a = 5)
   * ```
   */
  readonly and: unique symbol;
  /**
   * Operator ANY ARRAY (PG only)
   *
   * ```js
   * [Op.any]: [2,3]
   * ```
   * In SQL
   * ```sql
   * ANY ARRAY[2, 3]::INTEGER
   * ```
   *
   * Operator LIKE ANY ARRAY (also works for iLike and notLike)
   *
   * ```js
   * [Op.like]: { [Op.any]: ['cat', 'hat']}
   * ```
   * In SQL
   * ```sql
   * LIKE ANY ARRAY['cat', 'hat']
   * ```
   */
  readonly any: unique symbol;
  /**
   * Operator BETWEEN
   *
   * ```js
   * [Op.between]: [6, 10]
   * ```
   * In SQL
   * ```sql
   * BETWEEN 6 AND 10
   * ```
   */
  readonly between: unique symbol;
  /**
   * With dialect specific column identifiers (PG in this example)
   *
   * ```js
   * [Op.col]: 'user.organization_id'
   * ```
   * In SQL
   * ```sql
   * = "user"."organization_id"
   * ```
   */
  readonly col: unique symbol;
  /**
   * Operator <@ (PG array contained by operator)
   *
   * ```js
   * [Op.contained]: [1, 2]
   * ```
   * In SQL
   * ```sql
   * <@ [1, 2)
   * ```
   */
  readonly contained: unique symbol;
  /**
   * Operator @> (PG array contains operator)
   *
   * ```js
   * [Op.contains]: [1, 2]
   * ```
   * In SQL
   * ```sql
   * @> [1, 2)
   * ```
   */
  readonly contains: unique symbol;
  /**
   * Operator LIKE
   *
   * ```js
   * [Op.endsWith]: 'hat'
   * ```
   * In SQL
   * ```sql
   * LIKE '%hat'
   * ```
   */
  readonly endsWith: unique symbol;
  /**
   * Operator =
   *
   * ```js
   * [Op.eq]: 3
   * ```
   * In SQL
   * ```sql
   * = 3
   * ```
   */
  readonly eq: unique symbol;
  /**
   * Operator >
   *
   * ```js
   * [Op.gt]: 6
   * ```
   * In SQL
   * ```sql
   * > 6
   * ```
   */
  readonly gt: unique symbol;
  /**
   * Operator >=
   *
   * ```js
   * [Op.gte]: 6
   * ```
   * In SQL
   * ```sql
   * >= 6
   * ```
   */
  readonly gte: unique symbol;

  /**
   * Operator ILIKE (case insensitive) (PG only)
   *
   * ```js
   * [Op.iLike]: '%hat'
   * ```
   * In SQL
   * ```sql
   * ILIKE '%hat'
   * ```
   */
  readonly iLike: unique symbol;
  /**
   * Operator IN
   *
   * ```js
   * [Op.in]: [1, 2]
   * ```
   * In SQL
   * ```sql
   * IN [1, 2]
   * ```
   */
  readonly in: unique symbol;
  /**
   * Operator ~* (PG only)
   *
   * ```js
   * [Op.iRegexp]: '^[h|a|t]'
   * ```
   * In SQL
   * ```sql
   * ~* '^[h|a|t]'
   * ```
   */
  readonly iRegexp: unique symbol;
  /**
   * Operator IS
   *
   * ```js
   * [Op.is]: null
   * ```
   * In SQL
   * ```sql
   * IS null
   * ```
   */
  readonly is: unique symbol;
  /**
   * Operator LIKE
   *
   * ```js
   * [Op.like]: '%hat'
   * ```
   * In SQL
   * ```sql
   * LIKE '%hat'
   * ```
   */
  readonly like: unique symbol;
  /**
   * Operator <
   *
   * ```js
   * [Op.lt]: 10
   * ```
   * In SQL
   * ```sql
   * < 10
   * ```
   */
  readonly lt: unique symbol;
  /**
   * Operator <=
   *
   * ```js
   * [Op.lte]: 10
   * ```
   * In SQL
   * ```sql
   * <= 10
   * ```
   */
  readonly lte: unique symbol;
  /**
   * Operator !=
   *
   * ```js
   * [Op.ne]: 20
   * ```
   * In SQL
   * ```sql
   * != 20
   * ```
   */
  readonly ne: unique symbol;
  /**
   * Operator &> (PG range does not extend to the left of operator)
   *
   * ```js
   * [Op.noExtendLeft]: [1, 2]
   * ```
   * In SQL
   * ```sql
   * &> [1, 2)
   * ```
   */
  readonly noExtendLeft: unique symbol;
  /**
   * Operator &< (PG range does not extend to the right of operator)
   *
   * ```js
   * [Op.noExtendRight]: [1, 2]
   * ```
   * In SQL
   * ```sql
   * &< [1, 2)
   * ```
   */
  readonly noExtendRight: unique symbol;
  /**
   * Operator NOT
   *
   * ```js
   * [Op.not]: true
   * ```
   * In SQL
   * ```sql
   * IS NOT TRUE
   * ```
   */
  readonly not: unique symbol;
  /**
   * Operator NOT BETWEEN
   *
   * ```js
   * [Op.notBetween]: [11, 15]
   * ```
   * In SQL
   * ```sql
   * NOT BETWEEN 11 AND 15
   * ```
   */
  readonly notBetween: unique symbol;
  /**
   * Operator NOT ILIKE (case insensitive) (PG only)
   *
   * ```js
   * [Op.notILike]: '%hat'
   * ```
   * In SQL
   * ```sql
   * NOT ILIKE '%hat'
   * ```
   */
  readonly notILike: unique symbol;
  /**
   * Operator NOT IN
   *
   * ```js
   * [Op.notIn]: [1, 2]
   * ```
   * In SQL
   * ```sql
   * NOT IN [1, 2]
   * ```
   */
  readonly notIn: unique symbol;
  /**
   * Operator !~* (PG only)
   *
   * ```js
   * [Op.notIRegexp]: '^[h|a|t]'
   * ```
   * In SQL
   * ```sql
   * !~* '^[h|a|t]'
   * ```
   */
  readonly notIRegexp: unique symbol;
  /**
   * Operator NOT LIKE
   *
   * ```js
   * [Op.notLike]: '%hat'
   * ```
   * In SQL
   * ```sql
   * NOT LIKE '%hat'
   * ```
   */
  readonly notLike: unique symbol;
  /**
   * Operator NOT REGEXP (MySQL/PG only)
   *
   * ```js
   * [Op.notRegexp]: '^[h|a|t]'
   * ```
   * In SQL
   * ```sql
   * NOT REGEXP/!~ '^[h|a|t]'
   * ```
   */
  readonly notRegexp: unique symbol;
  /**
   * Operator OR
   *
   * ```js
   * [Op.or]: [{a: 5}, {a: 6}]
   * ```
   * In SQL
   * ```sql
   * (a = 5 OR a = 6)
   * ```
   */
  readonly or: unique symbol;
  /**
   * Operator && (PG array overlap operator)
   *
   * ```js
   * [Op.overlap]: [1, 2]
   * ```
   * In SQL
   * ```sql
   * && [1, 2)
   * ```
   */
  readonly overlap: unique symbol;
  /**
   * Internal placeholder 
   *
   * ```js
   * [Op.placeholder]: true
   * ```
   */
  readonly placeholder: unique symbol;
  /**
   * Operator REGEXP (MySQL/PG only)
   *
   * ```js
   * [Op.regexp]: '^[h|a|t]'
   * ```
   * In SQL
   * ```sql
   * REGEXP/~ '^[h|a|t]'
   * ```
   */
  readonly regexp: unique symbol;
  /**
   * Operator LIKE
   *
   * ```js
   * [Op.startsWith]: 'hat'
   * ```
   * In SQL
   * ```sql
   * LIKE 'hat%'
   * ```
   */
  readonly startsWith: unique symbol;
  /**
   * Operator << (PG range strictly left of operator)
   *
   * ```js
   * [Op.strictLeft]: [1, 2]
   * ```
   * In SQL
   * ```sql
   * << [1, 2)
   * ```
   */
  readonly strictLeft: unique symbol;
  /**
   * Operator >> (PG range strictly right of operator)
   *
   * ```js
   * [Op.strictRight]: [1, 2]
   * ```
   * In SQL
   * ```sql
   * >> [1, 2)
   * ```
   */
  readonly strictRight: unique symbol;
  /**
   * Operator LIKE
   *
   * ```js
   * [Op.substring]: 'hat'
   * ```
   * In SQL
   * ```sql
   * LIKE '%hat%'
   * ```
   */
  readonly substring: unique symbol;
  /**
   * Operator VALUES
   * 
   * ```js
   * [Op.values]: [4, 5, 6]
   * ```
   * In SQL
   * ```sql
   * VALUES (4), (5), (6)
   * ```
   */
  readonly values: unique symbol;
};

export = Op;

Answer 5

let where = {}

if (req.query.id) {
  where = {
    id: req.query.id
  }
}

Model.findAll({
  where: where
});