sql - Sequelize 自关联插入或更新表违反外键约束 fkey

Question

创建自关联时出现 SequelizeForeignKeyConstraintError

const Category=sequelize.define('Category',{
        name:{ type:DataTypes.STRING, defaultValue: '' },
        parentCategoryId:{ type:DataTypes.INTEGER},
        });

    Category.associate = (models) => {
        Category.hasMany(models.Category, {as: 'subCategories', foreignKey: 'parentCategoryId'});
        Category.belongsTo(models.Category, {as: 'parent', foreignKey: 'parentCategoryId'});
    };

Trace: { SequelizeForeignKeyConstraintError: insert or update on table  violates foreign key constraint fkey

Answer 1

删除关联列并再次同步

ALTER TABLE public."Categories" DROP "parentCategoryId"

然后再次与 sequilize 同步它会创建正确的关联
小心这会删除旧的 parentCategoryId cdata