從GraphQL查詢到Sequelize.js SELECT…WHERE COL1 = X AND（COL2 LIKE Y或COL3 LIKE Y）

Question

我試圖弄清楚如何用Sequelize.js進行查詢，輸出類似

SELECT ... WHERE C1 = X AND (C2 LIKE '%Y%' OR C3 LIKE '%Y%')... to MySQL

碼

const resolvers = {
  Query: {
    findItems(_, args) {
      return Item.findAll({
        limit: 10,
        active: 1,
        offset: args.offset,
        order: [['created_at', 'DESC']],
        $or: [
          {
            column_a: {
              $like: args.y,
            },
          },
          {
            column_b: {
              $like: args.y,
            },
          }]
      });
    }
  }
}

它正在查詢SELECT * FROM item ORDER BY created_at DESC LIMIT... （無位置）

GraphQL的架構

const typeDefinitions = `
        type Item {
                column_a: String,
                column_b: String,
                active: Int,
        }
        type Query {
                findItems(column_a: String, column_b: String, active: Int, offset: Int): [Item]
        }
        type Mutation {
                //..
        }
        schema {
                query: Query
                mutation: Mutation
}`;
export default [typeDefinitions];

Sequelize.js的文檔沒有解釋如何執行此查詢，我也不知道問題是否來自GraphQL查詢。

這是查詢

{
  findItems(column_a: "hello", column_b:"hello", active: 1, offset: 0) {
    column_a
    column_b
    active
    created_at
  }
}

SELECT * FROM item ORDER BY created_at DESC LIMIT... （無位置）

Answer 1

您始終可以傳遞一個可選的where對象來過濾查詢。 請參閱查詢

const resolvers = {
  Query: {
    findItems(_, args) {
      return Item.findAll({
        where: {
          column_a: args.x
        },
        limit: 10,
        active: 1,
        offset: args.offset,
        order: [['created_at', 'DESC']],
        $or: [
          {
            column_a: {
              $like: args.y,
            },
          },
          {
            column_b: {
              $like: args.y,
            },
          }]
      });
    }
  }
}

Answer 2

必須將$ or放在where內並添加一個美元符號。

const resolvers = {
  Query: {
    findItems(_, args) {
      return Item.findAll({
        where: {
        active: 1,
        $or: [
          {
            column_a: {
              $like: args.y,
            },
          },
          {
            column_b: {
              $like: args.y,
            },
          }],
        },
        limit: 10,
        active: 1,
        offset: args.offset,
        order: [['created_at', 'DESC']],
      });
    }
  }
}