Class: SimpleMongoReader
Read in from MongoDB
Implements
Constructors
new SimpleMongoReader()
new SimpleMongoReader(
client):SimpleMongoReader
Parameters
• client: MongoClient
Returns
Source
packages/core/src/readers/SimpleMongoReader.ts:12
Properties
client
privateclient:MongoClient
Source
packages/core/src/readers/SimpleMongoReader.ts:10
Methods
flatten()
privateflatten(texts):string[]
Flattens an array of strings or string arrays into a single-dimensional array of strings.
Parameters
• texts: (string | string[])[]
The array of strings or string arrays to flatten.
Returns
string[]
The flattened array of strings.
Source
packages/core/src/readers/SimpleMongoReader.ts:21
loadData()
loadData(
dbName,collectionName,fieldNames,separator,filterQuery,maxDocs,metadataNames?):Promise<Document<Metadata>[]>
Loads data from MongoDB collection
Parameters
• dbName: string
The name of the database to load.
• collectionName: string
The name of the collection to load.
• fieldNames: string[]= undefined
An array of field names to retrieve from each document. Defaults to ["text"].
• separator: string= ""
The separator to join multiple field values. Defaults to an empty string.
• filterQuery: Record<string, any>= {}
Specific query, as specified by MongoDB NodeJS documentation.
• maxDocs: number= 0
The maximum number of documents to retrieve. Defaults to 0 (retrieve all documents).
• metadataNames?: string[]
An optional array of metadata field names. If specified extracts this information as metadata.
Returns
Promise <Document <Metadata>[]>
Implementation of
Throws
If a field specified in fieldNames or metadataNames is not found in a MongoDB document.