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Operadores e coletores

hasRoot Operador

Definição

hasRoot

O operador hasRoot pode ser usado para consultar campos de nível raiz quando você especifica as opções returnScope e returnStoredSource.

Sintaxe

hasRoot tem a seguinte sintaxe:

1{
2  $search: {
3    "index": "<index name>", // optional, defaults to "default"
4    "hasRoot": {
5      "operator": {
6        <operator-specification>
7      }
8    },
9    "returnScope": {
10      "path": "<embedded-documents-field-to-retrieve>"
11    },
12    "returnStoredSource": true,
13  }
14}

Campos

Campo
Tipo
Descrição
necessidade

operator

Objeto

Operador a ser usado para fazer query de um campo indexado. Isto especifica os critérios de pesquisa para filtrar os documentos filhos.

Obrigatório

Requisitos

Para utilizar este operador, você deve fazer o seguinte na definição de índice:

  • Indexe o campo de nível raiz que você deseja fazer a query.

  • Indexe a array de objetos que você deseja recuperar como o tipo embeddedDocuments. Você também deve configurar storedSource para campos aninhados que deseja recuperar.

Na query, você deve fazer o seguinte:

  • Especifique returnScope para definir o escopo do campo para pesquisar o operador.

  • Defina returnStoredSource como true para retornar os campos storedSource.

Exemplos

Os exemplos nesta seção utilizam o namespace sample_training.companies. Se você carregar o conjunto de dados de amostra e criar o índice na coleção, poderá tentar as queries de amostra demonstradas nesta seção.

Índice de amostra

As queries nesta seção utilizam o seguinte índice. Esta definição de índice configura o MongoDB Search para fazer o seguinte:

  • Indexe automaticamente todos os campos dinamicamente indexáveis na coleção.

  • Indexe os products funding_rounds funding_rounds.investments campos, e como o tipo embeddedDocuments.

  • Armazene os seguintes campos em mongot:

    • funding_rounds.raised_currency_code

    • funding_rounds.raised_amount

    • funding_rounds.investments

    • products.name

1{
2  "mappings": {
3    "dynamic": true,
4    "fields": {
5      "funding_rounds": {
6        "dynamic": true,
7        "fields": {
8          "investments": [
9            {
10              "dynamic": true,
11              "type": "embeddedDocuments"
12            }
13          ]
14        },
15        "storedSource": {
16          "include": [
17            "raised_currency_code",
18            "raised_amount",
19            "investments"
20          ]
21        },
22        "type": "embeddedDocuments"
23      },
24      "products": {
25        "dynamic": true,
26        "storedSource": {
27          "include": [
28            "name"
29          ]
30        },
31        "type": "embeddedDocuments"
32      }
33    }
34  }
35}

Query simples

A seguinte query retorna products onde o campo de nível raiz founded_year está entre os anos 2005 e 2010.

1db.companies.aggregate([
2  {
3    "$search": { 
4      "returnStoredSource": true,
5      "returnScope": { "path": "products" },
6      "hasRoot": {
7        "operator": {
8          "range": {
9            "path": "founded_year",
10            "gte": 2005,
11            "lte": 2010
12          }
13        }
14      }
15    }
16  }
17])
[
  { name: 'Wikison Wetpaint' },
  { name: 'Wetpaint Social Distribution System' },
  { name: 'Omnidrive' },
  { name: 'Twitter Blocks' },
  { name: 'Twicco' },
  { name: 'Slacker Web Player' },
  { name: 'Slacker Desktop Radio' },
  { name: 'Slacker Portable Player' },
  { name: 'Babelgum' },
  { name: 'Powerset' },
  { name: 'OpenX Enterprise' },
  { name: 'OpenX Market' },
  { name: 'OpenX Lift' },
  { name: 'Sparter' },
  { name: 'Thoof' },
  { name: 'MyFree411' },
  { name: 'Wesabe' },
  { name: 'Prosper' },
  { name: 'Stickam' },
  { name: 'PayPerLive.com' }
]

Query de vários níveis

A consulta a seguir pesquisa o campo name da empresa chamada Facebook usando o operador text para recuperar o valor aplicado (funding_rounds.raised_amount e funding_rounds.raised_currency_code) por todos os Investidores (investments.person e investments.financial_org) em a empresa.

1db.companies.aggregate([
2  {
3    "$search": { 
4      "returnStoredSource": true,
5      "returnScope": { "path": "funding_rounds" },
6      "hasRoot": {
7        "operator": {
8          "text": {
9            "path": "name",
10            "query": "Facebook"
11          }
12        }
13      }
14    }
15  }
16])
[
  {
    raised_amount: 500000,
    raised_currency_code: 'USD',
    investments: [
      {
        company: null,
        financial_org: null,
        person: {
          first_name: 'Peter',
          last_name: 'Thiel',
          permalink: 'peter-thiel'
        }
      },
      {
        company: null,
        financial_org: null,
        person: {
          first_name: 'Reid',
          last_name: 'Hoffman',
          permalink: 'reid-hoffman'
        }
      }
    ]
  },
  {
    raised_amount: 12700000,
    raised_currency_code: 'USD',
    investments: [
      {
        company: null,
        financial_org: { name: 'Accel Partners', permalink: 'accel-partners' },
        person: null
      },
      {
        company: null,
        financial_org: null,
        person: {
          first_name: 'Mark',
          last_name: 'Pincus',
          permalink: 'mark-pincus'
        }
      },
      {
        company: null,
        financial_org: null,
        person: {
          first_name: 'Reid',
          last_name: 'Hoffman',
          permalink: 'reid-hoffman'
        }
      }
    ]
  },
  {
    raised_amount: 27500000,
    raised_currency_code: 'USD',
    investments: [
      {
        company: null,
        financial_org: { name: 'Greylock Partners', permalink: 'greylock' },
        person: null
      },
      {
        company: null,
        financial_org: {
          name: 'Meritech Capital Partners',
          permalink: 'meritech-capital-partners'
        },
        person: null
      },
      {
        company: null,
        financial_org: { name: 'Founders Fund', permalink: 'founders-fund' },
        person: null
      },
      {
        company: null,
        financial_org: { name: 'SV Angel', permalink: 'sv-angel' },
        person: null
      }
    ]
  },
  {
    raised_amount: 240000000,
    raised_currency_code: 'USD',
    investments: [
      {
        company: { name: 'Microsoft', permalink: 'microsoft' },
        financial_org: null,
        person: null
      }
    ]
  },
  {
    raised_amount: 60000000,
    raised_currency_code: 'USD',
    investments: [
      {
        company: null,
        financial_org: null,
        person: {
          first_name: 'Li',
          last_name: 'Ka-shing',
          permalink: 'li-ka-shing'
        }
      },
      {
        company: null,
        financial_org: { name: 'Horizons Ventures', permalink: 'horizons-ventures' },
        person: null
      }
    ]
  },
  {
    raised_amount: 15000000,
    raised_currency_code: 'USD',
    investments: [
      {
        company: null,
        financial_org: {
          name: 'European Founders Fund',
          permalink: 'european-founders-fund'
        },
        person: null
      }
    ]
  },
  {
    raised_amount: 100000000,
    raised_currency_code: 'USD',
    investments: [
      {
        company: null,
        financial_org: {
          name: 'TriplePoint Capital',
          permalink: 'triplepoint-capital'
        },
        person: null
      }
    ]
  },
  {
    raised_amount: 60000000,
    raised_currency_code: 'USD',
    investments: [
      {
        company: null,
        financial_org: null,
        person: {
          first_name: 'Li',
          last_name: 'Ka-shing',
          permalink: 'li-ka-shing'
        }
      },
      {
        company: null,
        financial_org: { name: 'Horizons Ventures', permalink: 'horizons-ventures' },
        person: null
      }
    ]
  },
  {
    raised_amount: 200000000,
    raised_currency_code: 'USD',
    investments: [
      {
        company: null,
        financial_org: {
          name: 'Digital Sky Technologies',
          permalink: 'digital-sky-technologies-fo'
        },
        person: null
      }
    ]
  },
  {
    raised_amount: 210000000,
    raised_currency_code: 'USD',
    investments: [
      {
        company: null,
        financial_org: { name: 'Elevation Partners', permalink: 'elevation-partners' },
        person: null
      }
    ]
  },
  {
    raised_amount: 1500000000,
    raised_currency_code: 'USD',
    investments: [
      {
        company: null,
        financial_org: { name: 'Goldman Sachs', permalink: 'goldman-sachs' },
        person: null
      },
      {
        company: null,
        financial_org: {
          name: 'Digital Sky Technologies',
          permalink: 'digital-sky-technologies-fo'
        },
        person: null
      }
    ]
  }
]

Query composta

A consulta a seguir funding_rounds.investments pesquisa no campo aninhado para organizações financeiros com o termo Ventures (em qualquer lugar no name campo ) que aplicaram em empresas descritas no termo network (em qualquer lugar no description campo ). A query usa o operador composto para pesquisar:

  • campo funding_rounds.investments.financial_org.name aninhado utilizando o operador embeddedDocument

  • campo de nível raiz description usando o operador hasRoot

O returnScope define o contexto dos operadores para o campo de tipo funding_rounds embeddedDocuments e o campo returnStoredSource é definido como true para retornar somente os campos storedSource. A query limita os resultados a 5 documentos.

1db.companies.aggregate([
2  {
3    "$search": { 
4      "compound": {
5        "should": [
6          {
7            "embeddedDocument": {
8              "path": "funding_rounds.investments",
9              "operator": {
10                "wildcard": {
11                  "path": "funding_rounds.investments.financial_org.name",
12                  "query": "*Ventures*",
13                  "allowAnalyzedField": true
14                }
15              }
16            }
17          },
18          {
19            "hasRoot": {
20              "operator": {
21                "wildcard": {
22                  "path": "description",
23                  "query": "*network*",
24                  "allowAnalyzedField": true
25                }
26              }
27            }
28          }
29        ]
30      },
31      "returnScope": {"path": "funding_rounds"},
32      "returnStoredSource": true
33    }
34  },
35  {
36    "$limit": 5
37  }
38])
[
  {
    raised_amount: 6500000,
    raised_currency_code: 'USD',
    investments: [
      {
        company: null,
        financial_org: {
          name: 'Velocity Interactive Group',
          permalink: 'velocity-interactive-group'
        },
        person: null
      },
      {
        company: null,
        financial_org: { name: 'TELUS Ventures', permalink: 'telus-ventures' },
        person: null
      },
      {
        company: null,
        financial_org: {
          name: 'Charles River Ventures',
          permalink: 'charles-river-ventures'
        },
        person: null
      },
      {
        company: null,
        financial_org: {
          name: 'Partech Ventures',
          permalink: 'partech-international'
        },
        person: null
      },
      {
        company: null,
        financial_org: { name: 'Fidelity Ventures', permalink: 'fidelity-ventures' },
        person: null
      },
      {
        company: null,
        financial_org: { name: 'Star Ventures', permalink: 'star-ventures' },
        person: null
      },
      {
        company: null,
        financial_org: { name: 'Castile Ventures', permalink: 'castile-ventures' },
        person: null
      }
    ]
  },
  {
    raised_amount: 25000000,
    raised_currency_code: 'USD',
    investments: [
      {
        company: null,
        financial_org: { name: 'Boulder Ventures', permalink: 'boulder-ventures' },
        person: null
      },
      {
        company: null,
        financial_org: { name: 'Sequel Venture Partners', permalink: 'sequel' },
        person: null
      },
      {
        company: null,
        financial_org: { name: 'Sprout Group', permalink: 'the-sprout-group' },
        person: null
      },
      {
        company: null,
        financial_org: { name: 'EPIC Ventures', permalink: 'epic-ventures' },
        person: null
      },
      {
        company: null,
        financial_org: {
          name: 'Garage Technology Ventures',
          permalink: 'garage-technology-ventures'
        },
        person: null
      },
      {
        company: null,
        financial_org: {
          name: 'Pritzker Group Venture Capital',
          permalink: 'pritzker-group-venture-capital'
        },
        person: null
      },
      {
        company: null,
        financial_org: { name: 'Ironside Ventures', permalink: 'ironside-ventures' },
        person: null
      },
      {
        company: null,
        financial_org: { name: 'Valhalla Partners', permalink: 'valhalla-partners' },
        person: null
      },
      {
        company: null,
        financial_org: { name: 'Vista Ventures', permalink: 'vista-ventures' },
        person: null
      },
      {
        company: null,
        financial_org: { name: 'JPMorgan Chase & Co', permalink: 'jpmorgan-chase-co' },
        person: null
      },
      {
        company: null,
        financial_org: {
          name: 'DFJ Portage Ventures',
          permalink: 'dfj-portage-ventures'
        },
        person: null
      }
    ]
  },
  {
    raised_amount: 49500000,
    raised_currency_code: 'USD',
    investments: [
      {
        company: null,
        financial_org: { name: 'Versant Ventures', permalink: 'versant-ventures' },
        person: null
      },
      {
        company: null,
        financial_org: { name: 'Skyline Ventures', permalink: 'skyline-ventures' },
        person: null
      },
      {
        company: null,
        financial_org: {
          name: 'Three Arch Partners',
          permalink: 'three-arch-partners'
        },
        person: null
      },
      {
        company: null,
        financial_org: {
          name: 'Affinity Capital Management',
          permalink: 'affinity-capital-management'
        },
        person: null
      },
      {
        company: null,
        financial_org: { name: 'Alloy Ventures', permalink: 'alloy-ventures' },
        person: null
      },
      {
        company: null,
        financial_org: { name: 'Delphi Ventures', permalink: 'delphi-ventures' },
        person: null
      },
      {
        company: null,
        financial_org: { name: 'GBS Ventures', permalink: 'gbs-ventures' },
        person: null
      },
      {
        company: null,
        financial_org: {
          name: 'INVESCO Private Capital',
          permalink: 'invesco-private-capital'
        },
        person: null
      },
      {
        company: null,
        financial_org: {
          name: 'J.P. Morgan Securities Inc.',
          permalink: 'j-p-morgan-securities-inc'
        },
        person: null
      },
      {
        company: null,
        financial_org: { name: 'ONSET Ventures', permalink: 'onset-ventures' },
        person: null
      }
    ]
  },
  {
    raised_amount: 1400000,
    raised_currency_code: 'USD',
    investments: [
      {
        company: null,
        financial_org: {
          name: 'Accelerator Ventures',
          permalink: 'accelerator-ventures'
        },
        person: null
      },
      {
        company: null,
        financial_org: { name: 'JAIC America', permalink: 'jaic-america' },
        person: null
      },
      {
        company: null,
        financial_org: {
          name: 'Pacific I&T Ventures',
          permalink: 'pacific-i-t-ventures'
        },
        person: null
      },
      {
        company: null,
        financial_org: null,
        person: {
          first_name: 'Eric',
          last_name: 'Di Benedetto',
          permalink: 'eric-di-benedetto'
        }
      },
      {
        company: null,
        financial_org: {
          name: 'iSteps App Ventures',
          permalink: 'isteps-app-ventures'
        },
        person: null
      },
      {
        company: null,
        financial_org: null,
        person: {
          first_name: 'Ben T.',
          last_name: 'Smith, IV',
          permalink: 'ben-smith-iv'
        }
      },
      {
        company: null,
        financial_org: null,
        person: {
          first_name: 'Tim',
          last_name: 'Stevens',
          permalink: 'tim-stevens'
        }
      },
      {
        company: null,
        financial_org: null,
        person: {
          first_name: 'Fabrice',
          last_name: 'Grinda',
          permalink: 'fabrice-grinda'
        }
      },
      {
        company: null,
        financial_org: { name: 'LaunchCapital', permalink: 'launchcapital' },
        person: null
      }
    ]
  },
  {
    raised_amount: 1000000,
    raised_currency_code: 'USD',
    investments: [
      {
        company: null,
        financial_org: {
          name: 'DFJ Gotham Ventures',
          permalink: 'dfj-gotham-ventures'
        },
        person: null
      },
      {
        company: null,
        financial_org: {
          name: 'Metamorphic Ventures',
          permalink: 'metamorphic-ventures-llc'
        },
        person: null
      },
      {
        company: null,
        financial_org: { name: 'RRE Ventures', permalink: 'rre-ventures' },
        person: null
      },
      {
        company: null,
        financial_org: { name: 'Pilot Group', permalink: 'pilot-group' },
        person: null
      },
      {
        company: null,
        financial_org: { name: 'AOL Ventures', permalink: 'aol-ventures' },
        person: null
      },
      {
        company: null,
        financial_org: { name: 'Lerer Ventures', permalink: 'lerer-ventures' },
        person: null
      },
      {
        company: null,
        financial_org: { name: 'Bowery Capital', permalink: 'bowery-capital' },
        person: null
      }
    ]
  }
]

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