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nestjs-prisma-querybuilder

v1.6.4

Published

Prisma QueryBuilder with Nestjs, removing the unused data request and allowing the frontend to choose which data to get, without leaving the REST standard.

Downloads

1,353

Readme

Nestjs/prisma-querybuilder

https://nestjs.com/img/logo_text.svg

Documentação / Documentation

English

  • How to install it?

    • npm i nestjs-prisma-querybuilder
  • If there is any CORS configuration in your project, add the properties count and page into your exposedHeaders;

  • In your app.module include Querybuilder to providers

    • PrismaService is your serive, to check how know create it read the documentation @nestjs/prisma;

      // app.module
      import { Querybuilder } from 'nestjs-prisma-querybuilder';
      
      providers: [PrismaService, QuerybuilderService, Querybuilder],
    • QuerybuilderService is your service and you will use it on your methods;

      import { BadRequestException, Inject, Injectable } from '@nestjs/common';
      import { REQUEST } from '@nestjs/core';
      import { Prisma } from '@prisma/client';
      import { Querybuilder, QueryResponse } from 'nestjs-prisma-querybuilder';
      import { Request } from 'express';
      import { PrismaService } from 'src/prisma.service';
      
      @Injectable()
      export class QuerybuilderService {
        constructor(@Inject(REQUEST) private readonly request: Request, private readonly querybuilder: Querybuilder, private readonly prisma: PrismaService) {}
      
        /**
         *
         * @param model model name on schema.prisma;
         * @param primaryKey primaryKey name for this model on prisma.schema;
         * @param where object to 'where' using the prisma rules;
         * @param mergeWhere define if the previous where will be merged with the query where or replace that;
         * @param justPaginate remove any 'select' and 'include'
         * @param setHeaders define if will set response headers 'count' and 'page'
         * @param depth limit the the depth to filter/populate. default is '_5_'
         * @param forbiddenFields fields that will be removed from any select/filter/populate/sort
         *
         */
        async query({
          model,
          depth,
          where,
          mergeWhere,
          justPaginate,
          forbiddenFields,
          primaryKey = 'id',
          setHeaders = true
        }: {
          model: Prisma.ModelName;
          where?: any;
          depth?: number;
          primaryKey?: string;
          mergeWhere?: boolean;
          setHeaders?: boolean;
          justPaginate?: boolean;
          forbiddenFields?: string[];
        }): Promise<Partial<QueryResponse>> {
          return this.querybuilder
            .query(primaryKey, depth, setHeaders, forbiddenFields)
            .then(async (query) => {
              if (where) query.where = mergeWhere ? { ...query.where, ...where } : where;
      
              if (setHeaders) {
                const count = await this.prisma[model].count({ where: query.where });
      
                this.request.res.setHeader('count', count);
              }
      
              if (justPaginate) {
                delete query.include;
                delete query.select;
              }
      
              return { ...query };
            })
            .catch((err) => {
              if (err.response?.message) throw new BadRequestException(err.response?.message);
      
              throw new BadRequestException('Internal error processing your query string, check your parameters');
            });
        }
      }
  • How to use it?

    You can use this frontend interface to make your queries easier -- Nestjs prisma querybuilder interface

    • Append your QuebruilderService in any service:

      // service
      constructor(private readonly prisma: PrismaService, private readonly qb: QuerybuilderService) {}
    • Config your method:

      • The query method will be mount the query with your @Query() from REQUEST, but you don't need to send him as a parameter;
      • The query will be append to the Response.headers with count property with total of objects found (include paginate)
      • The query will be receive one string with your model name, this will be used to make the count;
        async UserExemple() {
          const query = await this.qb.query('User');
      
          return this.prisma.user.findMany(query);
        }
  • Available parameters:

    • models for exemple:

      model User {
        id    Int     @id @default(autoincrement())
        email String  @unique
        name  String?
        posts Post[]
      
        @@map("users")
      }
      
      model Post {
        id        Int      @id @default(autoincrement())
        title     String
        published Boolean? @default(false)
        author    User?    @relation(fields: [authorId], references: [id])
        authorId  Int?
      
        content Content[]
      
        @@map("posts")
      }
      
      model Content {
        id   Int    @id @default(autoincrement())
        text String
      
        post   Post @relation(fields: [postId], references: [id])
        postId Int
      
        @@map("contents")
      }
    • Page and Limit

      • By default the paginate always enable and if consumer don't send page and limit on query, will return page 1 and 10 items;
      • on Response.headers will have the property count and page with total of items and page number;
      • http://localhost:3000/posts?page=2&limit=10
    • Sort

      • To use sort needed two properties criteria and field;
      • criteria is a enum with asc and desc;
      • field is the field that sort will be applied;
      • http://localhost:3000/posts?sort[criteria]=asc&sort[field]=title
    • Distinct

      • All the properties will be separeted by blank space, comma or semicolon;
      • To use distinct is needed only a string;
      • http://localhost:3000/posts?distinct=title published
    • Select

      • All the properties will be separeted by blank space, comma or semicolon;

      • By default if you don't send any select the find just will return the id property;

      • If it is necessary to take the whole object it is possible to use select=all;

      • Exception: If you select a relationship field will be return all the object, to select a field in one relation you can use populate and to find just him id is possible to use authorId field;

      • http://localhost:3000/posts?select=id title,published;authorId

      • To exclude fields from the return, you can use a dto on prisma response before return to the user OR use the parameter 'forbiddenFields' into query method;

        • Exemple a user password or token informations;
        • When using forbiddenFields select 'all' will be ignored;
    • Populate

      • Populate is an array and that allows you to select in the fields of relationships, him need two parameters path and select;
      • path is the relationship reference (ex: author);
      • select are the fields that will be returned;
        • select=all is not supported by populate
      • primaryKey is the reference to primary key of the relationship (optional) (default: 'id');
      • The populate index is needed to link the properties path and select;
      • http://localhost:3000/posts?populate[0][path]=author&populate[0][select]=name email
    • Filter

      • Can be used to filter the query with your requeriments
      • path is a reference from the property that will applied the filter;
      • value is the value that will be filtered;
      • filterGroup can be used to make where with operators and, or and not or no operator (optional);
        • accepted types: ['and', 'or, 'not’]
      • operator can be used to personalize your filter (optional);
        • accepted types: ['contains', 'endsWith', 'startsWith', 'equals', 'gt', 'gte', 'in', 'lt', 'lte', 'not', 'notIn', 'hasEvery', 'hasSome', 'has', 'isEmpty']
        • hasEvery, hasSome and notIn are a unique string and values are separeted by blank space
          • ?filter[0][path]=name&filter[0][operator]=hasSome&filter[0][value]=foo bar ula
      • insensitive can be used to filter (optional);
      • type needs to be used if value don't is a string;
        • accepted types: ['string', 'boolean', 'number', 'date' , 'object'] - default: 'string'
          • 'object' accepted values: ['null', 'undefined']
      • filter is an array and that allows you to append some filters to the same query;
      • http://localhost:3000/posts?filter[0][path]=title&filter[0][value]=querybuilder&filter[1][path]=published&filter[1][value]=false
      • http://localhost:3000/posts?filter[1][path]=published&filter[1][value]=false&filter[1][type]=boolean
      • http://localhost:3000/posts?filter[0][path]=title&filter[0][value]=querybuilder&filter[0][filterGroup]=and&filter[1][path]=published&filter[1][value]=falsefilter[1][filterGroup]=and

Português

  • Como instalar?

    • npm i nestjs-prisma-querybuilder
  • No seu app.module inclua o Querybuilder aos providers:

    • PrismaService é o seu service, para ver como criar ele leia a documentação @nestjs/prisma;

      // app.module
      import { Querybuilder } from 'nestjs-prisma-querybuilder';
      
      providers: [PrismaService, QuerybuilderService, Querybuilder],
    • QuerybuilderService vai ser o service que será usado nos seus métodos;

      import { BadRequestException, Inject, Injectable } from '@nestjs/common';
      import { REQUEST } from '@nestjs/core';
      import { Prisma } from '@prisma/client';
      import { Querybuilder, QueryResponse } from 'nestjs-prisma-querybuilder';
      import { Request } from 'express';
      import { PrismaService } from 'src/prisma.service';
      
      @Injectable()
      export class QuerybuilderService {
        constructor(@Inject(REQUEST) private readonly request: Request, private readonly querybuilder: Querybuilder, private readonly prisma: PrismaService) {}
      
        /**
         *
         * @param model nome do model no schema.prisma;
         * @param primaryKey nome da chave primaria deste model no prisma.schema;
         * @param where objeto para where de acordo com as regras do prisma;
         * @param mergeWhere define se o where informado no parâmetro anterior será unido ou substituirá um possivel where vindo da query;
         * @param justPaginate remove qualquer 'select' e 'populate' da query;
         * @param setHeaders define se será adicionado os headers 'count' e 'page' na resposta;
         * @param depth limita o numero de 'niveis' que a query vai lhe permitir fazer (filter/populate). default is '_5_'
         * @param forbiddenFields campos que serão removidos de qualquer select/filter/populate/sort
         */
        async query({
          model,
          depth,
          where,
          mergeWhere,
          justPaginate,
          forbiddenFields,
          primaryKey = 'id',
          setHeaders = true
        }: {
          model: Prisma.ModelName;
          where?: any;
          depth?: number;
          primaryKey?: string;
          mergeWhere?: boolean;
          setHeaders?: boolean;
          justPaginate?: boolean;
          forbiddenFields?: string[];
        }): Promise<Partial<QueryResponse>> {
          return this.querybuilder
            .query(primaryKey, depth, setHeaders, forbiddenFields)
            .then(async (query) => {
              if (where) query.where = mergeWhere ? { ...query.where, ...where } : where;
      
              if (setHeaders) {
                const count = await this.prisma[model].count({ where: query.where });
      
                this.request.res.setHeader('count', count);
              }
      
              if (onlyPaginate) {
                delete query.include;
                delete query.select;
              }
      
              return { ...query };
            })
            .catch((err) => {
              if (err.response?.message) throw new BadRequestException(err.response?.message);
      
              throw new BadRequestException('Internal error processing your query string, check your parameters');
            });
        }
      }
  • Optional: Você pode adicionar uma validação adicional para o parametro model, mas essa validação vai variar de acordo com o seu database;

    • Exemplo com SQLite

      if (!this.tables?.length) this.tables = await this.prisma.$queryRaw`SELECT name FROM sqlite_schema WHERE type ='table' AND name NOT LIKE 'sqlite_%';`;
      
      if (!this.tables.find((v) => v.name === model)) throw new BadRequestException('Invalid model');
  • Como usar?

    Você pode usar essa interface para tornar suas queries mais fácies no frontend -- Nestjs prisma querybuilder interface

    • Adicione o Querybuilder no seu service:

      // service
      constructor(private readonly prisma: PrismaService, private readonly qb: QuerybuilderService) {}
    • Configurando seu método:

      • o método query vai montar a query baseada no @Query(), mas o mesmo é pego direto do REQUEST, não sendo necessário passar como parâmetro;
      • o método query já vai adicionar no Response.headers a propriedade count que vai ter o total de objetos encontrados (usado para paginação);
      • o método query recebe uma string com o nome referente ao model, isso vai ser usado para fazer o count;
        async UserExemple() {
          const query = await this.qb.query('User');
      
          return this.prisma.user.findMany(query);
        }
  • Parametros disponiveis:

    • models de exemplo:

      model User {
        id    Int     @id @default(autoincrement())
        email String  @unique
        name  String?
        posts Post[]
      
        @@map("users")
      }
      
      model Post {
        id        Int      @id @default(autoincrement())
        title     String
        published Boolean? @default(false)
        author    User?    @relation(fields: [authorId], references: [id])
        authorId  Int?
      
        content Content[]
      
        @@map("posts")
      }
      
      model Content {
        id   Int    @id @default(autoincrement())
        text String
      
        post   Post @relation(fields: [postId], references: [id])
        postId Int
      
        @@map("contents")
      }
    • Page e Limit

      • Por padrão a páginação está sempre habilitada e se não enviado page e limit na query, vai ser retornado página 1 com 10 itens;
      • Nos headers da response haverá a propriedade count com o total de itens a serem paginados;
      • http://localhost:3000/posts?page=2&limit=10
    • Sort

      • Para montar o sort são necessário enviar duas propriedades field e criteria;
      • criteria é um enum com [‘asc’, ‘desc’];
      • field é o campo pelo qual a ordenação vai ser aplicada;
      • http://localhost:3000/posts?sort[criteria]=asc&sort[field]=title
    • Distinct

      • Todas as propriedades devem ser separadas por espaço em branco, virgula ou ponto e virgula;
      • Para montar o distinct é necessário enviar apenas os valores;
      • http://localhost:3000/posts?distinct=title published
    • Select

      • Todas as propriedades devem ser separadas por espaço em branco, virgula ou ponto e virgula;

      • Por padrão se não for enviado nenhum select qualquer busca só irá retornar a propriedade id

      • Se for necessário pegar todo o objeto é possível usar select=all,

      • Exceção: ao dar select em um relacionamento será retornado todo o objeto do relacionamento, para usar o select em um relacionamento use o populate, para buscar somente o id de um relacionamento é possível usar a coluna authorId

      • http://localhost:3000/posts?select=id title,published;authorId

      • Para excluir campos no retorno, você pode utilizar um DTO na resposta do prisma antes de devolve-lá ao usuário OU usar o parametro 'forbiddenFields' no método query ;

        • Exemplo uma senha de usuário ou informações de tokens;
        • Ao usar forbiddenFields select 'all' será ignorado;
    • Populate

      • Populate é um array que permite dar select nos campos dos relacionamentos, é composto por 2 parametros, path e select;
      • path é a referencia para qual relacionamento será populado;
      • select são os campos que irão serem retornados;
        • select=all não é suportado no populate
      • primaryKey nome da chave primaria do relacionamento (opcional) (default: 'id');
      • Podem ser feitos todos os populates necessários usando o índice do array para ligar o path ao select;
      • http://localhost:3000/posts?populate[0][path]=author&populate[0][select]=name email
    • Filter

      • Pode ser usado para filtrar a consulta com os parâmetros desejados;
      • path é a referencia para qual propriedade irá aplicar o filtro;
      • value é o valor pelo qual vai ser filtrado;
      • filterGroup Pode ser usado para montar o where usando os operadores [‘AND’, ‘OR’, ‘NOT’] ou nenhum operador (opcional);
        • opções: ['and', 'or, 'not’]
      • operator pode ser usado para personalizar a consulta (opcional);
        • recebe os tipos ['contains', 'endsWith', 'startsWith', 'equals', 'gt', 'gte', 'in', 'lt', 'lte', 'not', 'notIn', 'hasEvery', 'hasSome', 'has', 'isEmpty']
        • hasEvery, hasSome e notIn recebe uma unica string separando os valores por um espaço em branco
          • ?filter[0][path]=name&filter[0][operator]=hasSome&filter[0][value]=foo bar ula
      • insensitive pode ser usado para personalizar a consulta (opcional);
      • type é usado caso o valor do filter NÃO seja do tipo 'string'
        • recebe os tipos: ['string', 'boolean', 'number', 'date' , 'object'] - default: 'string'
          • 'object' recebe os valores: ['null', 'undefined']
      • filter é um array, podendo ser adicionados vários filtros de acordo com a necessidade da consulta;
      • consulta simples
        • http://localhost:3000/posts?filter[0][path]=title&filter[0][value]=querybuilder&filter[1][path]=published&filter[1][value]=false
        • http://localhost:3000/posts?filter[1][path]=published&filter[1][value]=false&filter[1][type]=boolean
        • http://localhost:3000/posts?filter[0][path]=title&filter[0][value]=querybuilder&filter[0][filterGroup]=and&filter[1][path]=published&filter[1][value]=falsefilter[1][filterGroup]=and