Question

我写了以下Sequelize片段：

  return context.model.siteStaff.findAll({
    where: Sequelize.where(
      Sequelize.fn('date', Sequelize.col('createdAt')), {
        [Op.eq]: moment(obj.date).toISOString()
      })
  });

Sequelize将其转换为：

SELECT "id",
       "siteId",
       "staffId",
       "timeStamp",
       "createdAt",
       "updatedAt"
FROM "operations"."site_staff" AS "site_staff"
WHERE 1 = 1;

正是这个“哪里1 = 1”困扰着我。如何让Sequelize生成类似以下内容的内容：

SELECT "id",
       "siteId",
       "staffId",
       "timeStamp",
       "createdAt",
       "updatedAt"
FROM "operations"."site_staff" AS "site_staff"
WHERE date(createdAt) = '...';

在我看来，这里有些基本内容。

Answer 1

您可以对代码进行一些小的调整，因为在需要建立数据库连接的地方，您可以像这样在其中添加OP

import Sequelize from 'sequelize';

const sequelize = new Sequelize(process.env.DATABASE_URL, {
  dialectOptions:   {timeout: 30},
  operatorsAliases: Sequelize.Op  // THE OPERATOR PARTS
});

logger.appLog('Database connection established');

这样可以简化操作员，因此您不必使用[Op.eq]。同样，在查询中，您可能会丢失Sequelize.，因此您可以编写更像自然语言的代码，并且更易于阅读/理解。

所以你可以写这样的东西

context.model.siteStaff.findAll({
  where: {
    createdAt: moment(obj.date).utc()
  }
});

这应生成

的输出

SELECT "id", "siteId", "staffId", "timeStamp", "createdAt", "updatedAt" 
FROM "operations"."site_staff" AS "site_staff"
WHERE "site_staff"."createdAt" = '2019-02-05 09:06:43.843 +00:00';

将具有功能的子句变为'1 = 1'

1 个答案: