Postgresql Sequelize Aggregate count函数使用where子句返回错误的值
我在postgresql中有两个表-系统和条件。 所有条件都将有一个systemID。 所有条件都将有一个字段“publishedStatus” 我的任务是获取具有关联“已发布”条件计数的所有系统Postgresql Sequelize Aggregate count函数使用where子句返回错误的值,postgresql,sequelize.js,Postgresql,Sequelize.js,我在postgresql中有两个表-系统和条件。 所有条件都将有一个systemID。 所有条件都将有一个字段“publishedStatus” 我的任务是获取具有关联“已发布”条件计数的所有系统 const allSystem = await db.System.findAll({ subQuery: false, attributes: ["id", "title", [db.sequelize.fn(&
const allSystem = await db.System.findAll({
subQuery: false,
attributes: ["id", "title", [db.sequelize.fn("COUNT", db.sequelize.col("conditions.systemID")), "conditionsCount"]],
include: [{
model: db.Condition,
as: "conditions",
attributes: [],
where: { publishedStatus: "published" },
required: false // <-------------
}],
group: ['System.id', 'conditions.systemID'],
});
下面是我的问题
const allSystem = await db.System.findAll({
subQuery: false,
attributes: ["id", "title", [db.sequelize.fn("COUNT", db.sequelize.col("conditions.systemID")), "conditionsCount"]],
include: [{
model: db.Condition,
as: "conditions",
attributes: [],
where: { publishedStatus: "published" },
}],
group: ['System.id', 'conditions.systemID'],
});
当我在'include'->中使用'where'子句时,将忽略具有0'published'条件的系统
然而,如果我删除'where'子句->则包括具有0个条件的系统。但它包括所有已发布状态的条件
结果供参考:
Background:
System 1 has 10 conditions. 8 published and 2 unpublished
System 2 has 4 conditions. 0 published and 4 unpublished
System 3 has 0 conditions. 0 published and 0 unpublished
Expected Result:
System 1 = 8 conditions
System 2 = 0 conditions
System 3 = 0 conditions
Without Where Clause:
System 1 = 10 conditions
System 2 = 4 conditions
System 3 = 0 conditions
With Where Clause: (Only 1 row is returned)
System 1 = 8 conditions
我如何达到我想要的结果?请提供帮助。您需要
required:false
才能使外部联接包含空条件
const allSystem = await db.System.findAll({
subQuery: false,
attributes: ["id", "title", [db.sequelize.fn("COUNT", db.sequelize.col("conditions.systemID")), "conditionsCount"]],
include: [{
model: db.Condition,
as: "conditions",
attributes: [],
where: { publishedStatus: "published" },
required: false // <-------------
}],
group: ['System.id', 'conditions.systemID'],
});
const allSystem=wait db.System.findAll({
子查询:false,
属性:[“id”、“title”、[db.sequelize.fn(“COUNT”、db.sequelize.col(“conditions.systemID”)、“conditionScont”],
包括:[{
型号:db.Condition,
作为:“条件”,
属性:[],
其中:{publishedStatus:“published”},
必填项:false//