npm package discovery and stats viewer.

Discover Tips

  • General search

    [free text search, go nuts!]

  • Package details

    pkg:[package-name]

  • User packages

    @[username]

Sponsor

Optimize Toolset

I’ve always been into building performant and accessible sites, but lately I’ve been taking it extremely seriously. So much so that I’ve been building a tool to help me optimize and monitor the sites that I build to make sure that I’m making an attempt to offer the best experience to those who visit them. If you’re into performant, accessible and SEO friendly sites, you might like it too! You can check it out at Optimize Toolset.

About

Hi, 👋, I’m Ryan Hefner  and I built this site for me, and you! The goal of this site was to provide an easy way for me to check the stats on my npm packages, both for prioritizing issues and updates, and to give me a little kick in the pants to keep up on stuff.

As I was building it, I realized that I was actually using the tool to build the tool, and figured I might as well put this out there and hopefully others will find it to be a fast and useful way to search and browse npm packages as I have.

If you’re interested in other things I’m working on, follow me on Twitter or check out the open source projects I’ve been publishing on GitHub.

I am also working on a Twitter bot for this site to tweet the most popular, newest, random packages from npm. Please follow that account now and it will start sending out packages soon–ish.

Open Software & Tools

This site wouldn’t be possible without the immense generosity and tireless efforts from the people who make contributions to the world and share their work via open source initiatives. Thank you 🙏

© 2024 – Pkg Stats / Ryan Hefner

@quocanhbk17/express-cassandra

v0.1.13

Published

Nest - modern, fast, powerful node.js web framework (@express-cassandra)

Downloads

1,283

Readme

Description

Express Cassandra utilities module for NestJS based on the express-cassandra package.

Installation

$ npm i --save @iaminfinity/express-cassandra

Usage

Import ExpressCassandraModule:

@Module({
  imports: [
    ExpressCassandraModule.forRoot({...})
  ],
  providers: [...]
})
export class AppModule {}

Async options

Quite often you might want to asynchronously pass your module options instead of passing them beforehand. In such case, use registerAsync() method, that provides a couple of various ways to deal with async data.

1. Use factory

ExpressCassandraModule.forRootAsync({
  useFactory: () => ({...}),
})

Obviously, our factory behaves like every other one (might be async and is able to inject dependencies through inject).

ExpressCassandraModule.forRootAsync({
  imports: [ConfigModule],
  useFactory: (configService: ConfigService) => configService.getDbConfig(),
  inject: [ConfigService],
})

2. Use class

ExpressCassandraModule.forRootAsync({
  useClass: ConfigService,
})

Above construction will instantiate ConfigService inside ExpressCassandraModule and will leverage it to create options object.

class ConfigService implements ExpressCassandraOptionsFactory {
  createExpressCassandraOptions(): ExpressCassandraModuleOptions {
    return {...};
  }
}

3. Use existing

ExpressCassandraModule.forRootAsync({
  imports: [ConfigModule],
  useExisting: ConfigService
})

It works the same as useClass with one critical difference - ExpressCassandraModule will lookup imported modules to reuse already created ConfigService, instead of instantiating it on its own.

ORM Options

import { Entity, Column } from '@iaminfinity/express-cassandra';

@Entity({
  table_name: 'photo',
  key: ['id'],
})
export class PhotoEntity {
  @Column({
    type: 'uuid',
    default: { $db_function: 'uuid()' },
  })
  id: any;

  @Column({
    type: 'text',
  })
  name: string;
}

Let's have a look at the PhotoModule

import { Module } from '@nestjs/common';
import { ExpressCassandraModule } from '@iaminfinity/express-cassandra';
import { PhotoService } from './photo.service';
import { PhotoController } from './photo.controller';
import { PhotoEntity } from './photo.entity';

@Module({
  imports: [ExpressCassandraModule.forFeature([PhotoEntity])],
  providers: [PhotoService],
  controllers: [PhotoController],
})
export class PhotoModule {}

This module uses forFeature() method to define which entities shall be registered in the current scope. Thanks to that we can inject the PhotoEntity to the PhotoService using the @InjectModel() decorator:

import { Injectable } from '@nestjs/common';
import { InjectModel, BaseModel } from '@iaminfinity/express-cassandra';
import { PhotoEntity } from './photo.entity';

@Injectable()
export class PersonService {
  constructor(
    @InjectModel(PhotoEntity)
    private readonly photoEntity: BaseModel<PhotoEntity>
  ) {}

  getByName(name: string): Promise<PhotoEntity> {
    return this.photoEntity.findOneAsync({ name: name }, { raw: true });
  }
}

Using Column Decorators: To auto-generate uuid/timeuuid column, you need to decorate an entity's properties you want to make into a auto-generated uuid/timeuuid column with a @GeneratedUUidColumn decorator.

import { Entity, Column, GeneratedUUidColumn } from '@iaminfinity/express-cassandra';

@Entity({
  table_name: 'photo',
  key: ['id'],
})
export class PhotoEntity {
  @GeneratedUUidColumn()
  id: any;

  @GeneratedUUidColumn('timeuuid')
  time_id: any;

  @Column({
    type: 'text',
  })
  name: string;
}

To auto-generate createdDate/updatedDate column, you need to decorate an entity's properties you want to make into a auto-generated createdDate/updatedDate column with a @CreateDateColumn or @UpdateDateColumn decorator.

To index a column, you need to decorate an entity's properties you want to index with a @IndexColumn decorator.

To auto-generate version column, you need to decorate an entity's properties you want to make into a auto-generated version column with a @VersionColumn decorator.

import { 
  Entity,
  Column,
  GeneratedUUidColumn,
  CreateDateColumn,
  UpdateDateColumn,
  IndexColumn,
  VersionColumn,
} from '@iaminfinity/express-cassandra';

@Entity({
  table_name: 'photo',
  key: ['id'],
})
export class PhotoEntity {
  @GeneratedUUidColumn()
  id: any;

  @GeneratedUUidColumn('timeuuid')
  time_id: any;

  @Column({
    type: 'text',
  })
  @IndexColumn()
  name: string;

  @CreateDateColumn()
  created_at: Date;

  @UpdateDateColumn()
  updated_at: Date;

  @VersionColumn()
  __v1: any;
}

Using Hook Function Decorators: An entity of express-cassandra support multiple hook function. For more details see.

To create hook function in an entity use @BeforeSave, @AfterSave, @BeforeUpdate, @AfterUpdate, @BeforeDelete, @AfterDelete decorators.

import { 
  Entity,
  Column,
  GeneratedUUidColumn,
  BeforeSave,
  AfterSave,
  BeforeUpdate,
  AfterUpdate,
  BeforeDelete,
  AfterDelete,
} from '@iaminfinity/express-cassandra';

@Entity({
  table_name: 'photo',
  key: ['id'],
})
export class PhotoEntity {
  @GeneratedUUidColumn()
  id: any;

  @GeneratedUUidColumn('timeuuid')
  time_id: any;

  @BeforeSave()
  beforeSave(instance: this, options: any) {}

  @AfterSave()
  afterSave(instance: this, options: any) {}

  @BeforeUpdate()
  beforeUpdate(query: any, updateValues: any, options: any) {}

  @AfterUpdate()
  afterUpdate(query: any, updateValues: any, options: any) {}

  @BeforeDelete()
  beforeDelete(query: any, options: any) {}

  @AfterDelete()
  afterDelete(query: any, options: any) {}
}

Using Repository

import { Module } from '@nestjs/common';
import { ExpressCassandraModule } from '@iaminfinity/express-cassandra';
import { PhotoService } from './photo.service';
import { PhotoController } from './photo.controller';
import { PhotoEntity } from './photo.entity';

@Module({
  imports: [ExpressCassandraModule.forFeature([PhotoEntity])],
  providers: [PhotoService],
  controllers: [PhotoController],
})
export class PhotoModule {}
import { Injectable } from '@nestjs/common';
import { InjectRepository, Repository } from '@iaminfinity/express-cassandra';
import { PhotoEntity } from './photo.entity';
import { Observable } from 'rxjs';

@Injectable()
export class PersonService {
  constructor(
    @InjectRepository(PhotoEntity)
    private readonly photoRepository: Repository<PhotoEntity>,
  ) {}

  getById(id: id): Observable<PhotoEntity> {
    return this.photoRepository.findOne({id});
  }
}

Using Custom Repository

Let's create a repository:

import { Repository, EntityRepository } from '@iaminfinity/express-cassandra';
import { PhotoEntity } from './photo.entity';
import { Observable } from 'rxjs';

@EntityRepository(PhotoEntity)
export class PhotoRepository extends Repository<PhotoEntity> {
  findById(id: any): Observable<PhotoEntity> {
    return this.findOne({ id: id });
  }
}

Let's have a look at the PhotoModule:

import { Module } from '@nestjs/common';
import { ExpressCassandraModule } from '@iaminfinity/express-cassandra';
import { PhotoService } from './photo.service';
import { PhotoController } from './photo.controller';
import { PhotoEntity } from './photo.entity';
import { PhotoRepository } from './photo.repository';

@Module({
  imports: [ExpressCassandraModule.forFeature([PhotoEntity, PhotoRepository])],
  providers: [PhotoService],
  controllers: [PhotoController],
})
export class PhotoModule {}

Now let's use PhotoRepository in PhotoService:

import { Injectable } from '@nestjs/common';
import { InjectRepository } from '@iaminfinity/express-cassandra';
import { PhotoEntity } from './photo.entity';
import { PhotoRepository } from './photo.repository';
import { Observable } from 'rxjs';

@Injectable()
export class PersonService {
  constructor(
    @InjectRepository(PhotoRepository)
    private readonly photoRepository: PhotoRepository,
  ) {}

  getById(id: any): Observable<PhotoEntity> {
    return this.photoRepository.findById(id);
  }
}

Injecting connection:

import { Injectable } from '@nestjs/common';
import { InjectRepository, InjectConnection } from '@iaminfinity/express-cassandra';
import { PhotoEntity } from './photo.entity';
import { PhotoRepository } from './photo.repository';
import { Observable } from 'rxjs';

@Injectable()
export class PersonService {
  constructor(
    @InjectConnection()
    private readonly connection: Connection,
    @InjectRepository(PhotoRepository)
    private readonly photoRepository: PhotoRepository,
  ) {}

  getById(id: any): Observable<PhotoEntity> {
    return this.photoRepository.findById(id);
  }
}

Using Elassandra

Express cassandra support Elassandra. For more details see.

@Module({
  imports: [
    ExpressCassandraModule.forRoot({
      clientOptions: {
        // omitted other options for clarity
      },
      ormOptions: {
        // omitted other options for clarity
        migration: 'alter',
        manageESIndex: true,
      }
    })
  ],
  providers: [...]
})
export class AppModule {}
import { Entity, Column } from '@iaminfinity/express-cassandra';

@Entity<PhotoEntity>({
  table_name: 'photo',
  key: ['id'],
  es_index_mapping: {
    discover: '.*',
    properties: {
      name : {
        type : 'string',
        index : 'analyzed',
      },
    },
  }
})
export class PhotoEntity {
  @Column({
    type: 'uuid',
    default: { $db_function: 'uuid()' },
  })
  id: any;

  @Column({
    type: 'text',
  })
  name: string;
}
import { Module } from '@nestjs/common';
import { ExpressCassandraModule } from '@iaminfinity/express-cassandra';
import { PhotoService } from './photo.service';
import { PhotoController } from './photo.controller';
import { PhotoEntity } from './photo.entity';

@Module({
  imports: [ExpressCassandraModule.forFeature([PhotoEntity])],
  providers: [PhotoService],
  controllers: [PhotoController],
})
export class PhotoModule {}
import { Injectable } from '@nestjs/common';
import { InjectModel, BaseModel } from '@iaminfinity/express-cassandra';
import { PhotoEntity } from './photo.entity';

@Injectable()
export class PersonService {
  constructor(
    @InjectModel(PhotoEntity)
    private readonly photoEntity: BaseModel<PhotoEntity>
  ) {}

  searchName(name: string): Promise<any> {
    return new Promise((resolve, reject) => {
      this.catModel.search({ q: `name:${name}` }, (err, response) => {
        if (err) {
          return reject(err);
        } else {
          return response(response);
        }
      });
    });
  }
}

Stay in touch