那些遇到过的问题

续集错误：关系不存在

Sid*_*odo 6 javascript postgresql node.js sequelize.js

我可以使用我的开发数据库中的表sequelize.js执行INSERT INTO命令，但不能在我的测试数据库中执行。

尽管进行了彻底的研究，我仍然无法解决这个问题。

已经在这里发布了一个类似的问题，尽管我无法用答案回答我的问题： 从 mysql 迁移后，使用 postgres 数据库进行续集不起作用

这是我的相关迁移文件：

'use strict';
module.exports = {
  up: (queryInterface, Sequelize) => {
    return queryInterface.createTable('Trees', {
      id: {
        allowNull: false,
        autoIncrement: true,
        primaryKey: true,
        type: Sequelize.INTEGER
      },
      title: {
        type: Sequelize.STRING,
        allowNull: false
      },
      content: {
        type: Sequelize.STRING(10000),
        allowNull: false
      },
      createdAt: {
        allowNull: false,
        type: Sequelize.DATE
      },
      updatedAt: {
        allowNull: false,
        type: Sequelize.DATE
      }
    });
  },
  down: (queryInterface, Sequelize) => {
    return queryInterface.dropTable('Trees');
  }
};
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这是模型文件：

'use strict';
module.exports = (sequelize, DataTypes) => {
  var Tree = sequelize.define('Tree', {
    title: {
      type: DataTypes.STRING,
      allowNull: false
    },
    content: {
      type: DataTypes.STRING(10000),
      allowNull: false
    }
  }, {});
  Tree.associate = function(models) {
    // associations can be defined here
  };
  return Tree;
};
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下面是访问数据库的代码：

const setTree = (treeVal, callback) => {
  console.log(`this would be the part`);
  Tree.create({
    title: 'Tree',
    content: JSON.stringify(treeVal)
  })
  .then((treeStr) => {
    let primaryTopics = JSON.parse(treeStr.content);
    callback(null, primaryTopics);
  })
  .catch((err) => {
    callback(err);
  });
}
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这是在module.exports方法中导出的：

  callTree(callback) {
    return Tree.findOne({
      where: {
        title: 'Tree'
      }
    })
    .then((treeStr) => {
      if (treeStr === null) {
        return callback(`not defined yet`);
      }
      let primaryTopics = treeStr.content;
      primaryTopics = JSON.parse(primaryTopics);
      callback(null, primaryTopics);
    })
    .catch((err) => {
      callback(err);
    });
  }
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我在此处使用此方法进行集成测试（PrimaryTopic 表位于同一个数据库中，我在尝试运行它时没有收到任何错误）：

  beforeEach((done) => {
    this.primaryTopic;
    sequelize.sync({force: true}).then((res) => {

      PrimaryTopic.create({
        title: 'Title: Hello World',
        content: '<p>Content: Hello World</p>'
      })
      .then((primaryTopic) => {
        this.primaryTopic = primaryTopic;
        treeQueries.buildTree((err, res) => {
          if (err) {
            console.error(err);
          }
        });
        done();
      })
      .catch((err) => {
        console.log(err);
        done();
      });

    });
  });
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我已经搜索了所有代码以查找可能的错误，但还没有找到任何东西。

我可以psql用来访问Trees测试数据库中的表，尽管它是空的。

我可以使用相同的代码Trees在开发数据库的表中插入一个值，没有任何问题。

这是我尝试运行测试时收到的错误（使用 jasmine.js 进行测试）：

{ SequelizeDatabaseError: relation "Trees" does not exist
    at Query.formatError (/home/siddhartha/Documents/01-Studio/01-Commercial-Public/01-Komodo/2018-resources/node_modules/sequelize/lib/dialects/postgres/query.js:363:16)
    at query.catch.err (/home/siddhartha/Documents/01-Studio/01-Commercial-Public/01-Komodo/2018-resources/node_modules/sequelize/lib/dialects/postgres/query.js:86:18)
    at tryCatcher (/home/siddhartha/Documents/01-Studio/01-Commercial-Public/01-Komodo/2018-resources/node_modules/bluebird/js/release/util.js:16:23)
    at Promise._settlePromiseFromHandler (/home/siddhartha/Documents/01-Studio/01-Commercial-Public/01-Komodo/2018-resources/node_modules/bluebird/js/release/promise.js:512:31)
    at Promise._settlePromise (/home/siddhartha/Documents/01-Studio/01-Commercial-Public/01-Komodo/2018-resources/node_modules/bluebird/js/release/promise.js:569:18)
    at Promise._settlePromise0 (/home/siddhartha/Documents/01-Studio/01-Commercial-Public/01-Komodo/2018-resources/node_modules/bluebird/js/release/promise.js:614:10)
    at Promise._settlePromises (/home/siddhartha/Documents/01-Studio/01-Commercial-Public/01-Komodo/2018-resources/node_modules/bluebird/js/release/promise.js:689:18)
    at Async._drainQueue (/home/siddhartha/Documents/01-Studio/01-Commercial-Public/01-Komodo/2018-resources/node_modules/bluebird/js/release/async.js:133:16)
    at Async._drainQueues (/home/siddhartha/Documents/01-Studio/01-Commercial-Public/01-Komodo/2018-resources/node_modules/bluebird/js/release/async.js:143:10)
    at Immediate.Async.drainQueues [as _onImmediate] (/home/siddhartha/Documents/01-Studio/01-Commercial-Public/01-Komodo/2018-resources/node_modules/bluebird/js/release/async.js:17:14)
    at runCallback (timers.js:756:18)
    at tryOnImmediate (timers.js:717:5)
    at processImmediate [as _immediateCallback] (timers.js:697:5)
  name: 'SequelizeDatabaseError',
  parent: 
   { error: relation "Trees" does not exist
    at Connection.parseE (/home/siddhartha/Documents/01-Studio/01-Commercial-Public/01-Komodo/2018-resources/node_modules/pg/lib/connection.js:553:11)
    at Connection.parseMessage (/home/siddhartha/Documents/01-Studio/01-Commercial-Public/01-Komodo/2018-resources/node_modules/pg/lib/connection.js:378:19)
    at Socket.<anonymous> (/home/siddhartha/Documents/01-Studio/01-Commercial-Public/01-Komodo/2018-resources/node_modules/pg/lib/connection.js:119:22)
    at Socket.emit (events.js:160:13)
    at addChunk (_stream_readable.js:269:12)
    at readableAddChunk (_stream_readable.js:256:11)
    at Socket.Readable.push (_stream_readable.js:213:10)
    at TCP.onread (net.js:599:20)
     name: 'error',
     length: 104,
     severity: 'ERROR',
     code: '42P01',
     detail: undefined,
     hint: undefined,
     position: '13',
     internalPosition: undefined,
     internalQuery: undefined,
     where: undefined,
     schema: undefined,
     table: undefined,
     column: undefined,
     dataType: undefined,
     constraint: undefined,
     file: 'parse_relation.c',
     line: '1160',
     routine: 'parserOpenTable',
     sql: 'INSERT INTO "Trees" ("id","title","content","createdAt","updatedAt") VALUES (DEFAULT,\'Tree\',\'[{"title":"Title: Hello World","id":1,"secondaryTopics":[]}]\',\'2018-08-14 06:38:37.243 +00:00\',\'2018-08-14 06:38:37.243 +00:00\') RETURNING *;' },
  original: 
   { error: relation "Trees" does not exist
    at Connection.parseE (/home/siddhartha/Documents/01-Studio/01-Commercial-Public/01-Komodo/2018-resources/node_modules/pg/lib/connection.js:553:11)
    at Connection.parseMessage (/home/siddhartha/Documents/01-Studio/01-Commercial-Public/01-Komodo/2018-resources/node_modules/pg/lib/connection.js:378:19)
    at Socket.<anonymous> (/home/siddhartha/Documents/01-Studio/01-Commercial-Public/01-Komodo/2018-resources/node_modules/pg/lib/connection.js:119:22)
    at Socket.emit (events.js:160:13)
    at addChunk (_stream_readable.js:269:12)
    at readableAddChunk (_stream_readable.js:256:11)
    at Socket.Readable.push (_stream_readable.js:213:10)
    at TCP.onread (net.js:599:20)
     name: 'error',
     length: 104,
     severity: 'ERROR',
     code: '42P01',
     detail: undefined,
     hint: undefined,
     position: '13',
     internalPosition: undefined,
     internalQuery: undefined,
     where: undefined,
     schema: undefined,
     table: undefined,
     column: undefined,
     dataType: undefined,
     constraint: undefined,
     file: 'parse_relation.c',
     line: '1160',
     routine: 'parserOpenTable',
     sql: 'INSERT INTO "Trees" ("id","title","content","createdAt","updatedAt") VALUES (DEFAULT,\'Tree\',\'[{"title":"Title: Hello World","id":1,"secondaryTopics":[]}]\',\'2018-08-14 06:38:37.243 +00:00\',\'2018-08-14 06:38:37.243 +00:00\') RETURNING *;' },
  sql: 'INSERT INTO "Trees" ("id","title","content","createdAt","updatedAt") VALUES (DEFAULT,\'Tree\',\'[{"title":"Title: Hello World","id":1,"secondaryTopics":[]}]\',\'2018-08-14 06:38:37.243 +00:00\',\'2018-08-14 06:38:37.243 +00:00\') RETURNING *;' }
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这是完整存储库的链接。

小智 9

我知道这已经过时了，但它可以帮助其他面临同样问题的人。我从 mysql 迁移到 postgres 并遇到了同样的问题，因为我的表名称以大写字母（“Home”）开头，并且我试图添加一个以小写字母开头的表名称“home”的约束。

小智 1

您需要在数据模型的选项中将 freezeTableName 设置为 true。否则sequelize将尝试搜索Trees表

module.exports = (sequelize, DataTypes) => {
  var Tree = sequelize.define('Tree', {
    title: {
      type: DataTypes.STRING,
      allowNull: false
    },
    content: {
      type: DataTypes.STRING(10000),
      allowNull: false
    }
  }, {
freezeTableName: true
});
  Tree.associate = function(models) {
    // associations can be defined here
  };
  return Tree;
};
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完整文档： https: //sequelize.org/v3/docs/models-definition/#configuration

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