我在PostgreSQL数据库上有两个表,合同和付款。一份合同完成了多次付款。
我有以下两个模型:
module.exports = function(sequelize, DataTypes) {
var contracts = sequelize.define('contracts', {
id: {
type: DataTypes.INTEGER,
autoIncrement: true
}
}, {
createdAt: false,
updatedAt: false,
classMethods: {
associate: function(models) {
contracts.hasMany(models.payments, {
foreignKey: 'contract_id'
});
}
}
});
return contracts;
};
module.exports = function(sequelize, DataTypes) {
var payments = sequelize.define('payments', {
id: {
type: DataTypes.INTEGER,
autoIncrement: true
},
contract_id: {
type: DataTypes.INTEGER,
},
payment_amount: DataTypes.INTEGER,
}, {
classMethods: {
associate: function(models) {
payments.belongsTo(models.contracts, {
foreignKey: 'contract_id'
});
}
}
});
return payments;
};
我想汇总每个合同的所有付款,并使用此函数:
models.contracts.findAll({
attributes: [
'id'
],
include: [
{
model: models.payments,
attributes: [[models.sequelize.fn('sum', models.sequelize.col('payments.payment_amount')), 'total_cost']]
}
],
group: ['contracts.id']
})
但它会生成以下查询:
SELECT "contracts"."id", "payments"."id" AS "payments.id", sum("payments"."payment_amount") AS "payments.total_cost"
FROM "contracts" AS "contracts"
LEFT OUTER JOIN "payments" AS "payments" ON "contracts"."id" = "payments"."contract_id" GROUP BY "contracts"."id";
我没有要求选择payments.id,因为我必须将它包含在聚合或group by函数中,就像我遇到的错误中所说的那样:
可能未处理的SequelizeDatabaseError:错误:列"payments.id“必须出现在GROUP BY子句中或在聚合函数中使用
我是不是漏掉了什么?我正在关注this answer,但即使在那里,我也不明白SQL请求如何有效。
发布于 2015-06-04 16:16:58
此问题已在Sequelize 3.0.1中修复,包含的型号的主键必须使用
attributes: []
并且聚合必须在主模型上完成(this github issue中的infos)。
因此,对于我的用例,代码如下
models.contracts.findAll({
attributes: ['id', [models.sequelize.fn('sum', models.sequelize.col('payments.payment_amount')), 'total_cost']],
include: [
{
model: models.payments,
attributes: []
}
],
group: ['contracts.id']
})
发布于 2015-03-03 18:51:45
你能把你的函数写成
models.contracts.findAll({
attributes: [
'models.contracts.id'
],
include: [
{
model: models.payments,
attributes: [[models.sequelize.fn('sum', models.sequelize.col('payments.payment_amount')), 'total_cost']]
}
],
group: ['contracts.id']
})
发布于 2015-03-04 01:15:16
试一试
group: ['contracts.id', 'payments.id']
https://stackoverflow.com/questions/28206680
复制相似问题