How do I add nested documents to MongoDB?

How do I add nested documents to MongoDB?

Using Shell

  1. [{“name”: “sub_system_1”, “data” : {“high” :[“task1″,”task2”], “mid”: [“task1″,”task2”], “low” : [“task1″,”task2”]}},{“name”: “sub_system_2″ ,”data”: {“high” :[“task1″,”task2”], “mid”: [“task1″,”task2”], “low” : [“task1″,”task2”]}}])

How do I query a nested document in MongoDB?

Query on Nested Field To specify a query condition on fields in an embedded/nested document, use dot notation ( “field. nestedField” ). When querying using dot notation, the field and nested field must be inside quotation marks.

What is embedded document in MongoDB?

An embedded, or nested, MongoDB Document is a normal document that’s nested inside another document within a MongoDB collection. Embedded documents are particularly useful when a one-to-many relationship exists between documents.

What data structure is used in MongoDB?

In MongoDB, data is stored as documents. These documents are stored in MongoDB in JSON (JavaScript Object Notation) format. JSON documents support embedded fields, so related data and lists of data can be stored with the document instead of an external table.

What is MongoDB and its advantages?

Advantages of MongoDB over RDBMS Structure of a single object is clear. MongoDB supports dynamic queries on documents using a document-based query language that’s nearly as powerful as SQL. Tuning. Ease of scale-out − MongoDB is easy to scale. Conversion/mapping of application objects to database objects not needed.

Which field is always the first field in the document?

_id field

What are MongoDB documents?

MongoDB is a document database: each record in a MongoDB collection is document. Documents are a structure composed of file and value pairs, similar to JSON objects or other mapping data types. Documents in MongoDB are BSON, which is a binary data format that is like JSON, but includes additional type data.

What is Document value?

Definition and Usage. The value property sets or returns the value of the value attribute of a text field. The value property contains the default value OR the value a user types in (or a value set by a script).

Why is a technology document of value?

Technical Documentation Improves Customer Retention Well-written technical documentation is worth the effort because it refines the user experience and resolves possible issues when using the product. If customers feel good about your product, they might want it again when the need arises in the future!

How do I use document getElementById?

When creating an element and assigning it an ID, you have to insert the element into the document tree with Node. insertBefore() or a similar method before you can access it with getElementById() : var element = document. createElement(‘div’); = ‘testqq’; var el = document.

How do you do documentation?

Best practices for writing documentation:

  1. Include A README file that contains.
  2. Allow issue tracker for others.
  3. Write an API documentation.
  4. Document your code.
  5. Apply coding conventions, such as file organization, comments, naming conventions, programming practices, etc.
  6. Include information for contributors.

What are 3 main parts in a technical document?

These elements, collectively called the format, include titles, abstracts, introductions and the like. Writers use formats to establish the order of content in the document’s front matter, body, and end matter.

What are the types of documentation?

The four kinds of documentation are:

  • learning-oriented tutorials.
  • goal-oriented how-to guides.
  • understanding-oriented discussions.
  • information-oriented reference material.

What is documentation process and types?

Generally, documentation is divided into two main areas. Process Documentation guides the development, testing, maintenance and improvement of systems. They are used by managers, engineers, testers, and marketing professionals. These documents use technical terms and industry-specific jargon.

What are the 2 types of documentation?

Types of documentation in system:

  • system documentation and.
  • user documentation.

What are 3 types of documents?

Common Types of Documents

  • Emails.
  • Business Letters.
  • Business Reports.
  • Transactional Documents.
  • Financial Reports and Documents.

What are the two types of documentation?

There are two types of documentation that should be produced when creating a new system:

  • User documentation.
  • Technical documentation.

What are the 4 kinds of documents?


  • Public Document.
  • Workplace Document.
  • Consumer Document.
  • Public Documents.
  • Consumer Document.

What are the 4 types of documentation?

They are: tutorials, how-to guides, technical reference and explanation. They represent four different purposes or functions, and require four different approaches to their creation. Understanding the implications of this will help improve most documentation – often immensely.

What are the major types of system documentation?

Types of system documentation include a requirements document, source code document, quality assurance documentation, software architecture documentation, solution instructions and a help guide for advanced users. Types of user documentation include training manuals, user manuals, release notes and installation guides.

What are the four purposes behind documentation?

Although there are many explicit purposes for creating a scientific or technical document, there are four general categories: to provide information, to give instructions, to persuade the reader, and to enact (or prohibit) something.

What are the steps of system design?

Specifying the input/output media, designing the database, and specifying backup procedures. Planning system implementation. Devising a test and implementation plan, and specifying any new hardware and software. Updating costs, benefits, conversion dates, and system constraints.

What is the purpose of system documentation?

Purpose of System Documentation: 1. To provide the necessary information to develop training programme for operators and users. 2. To create a vehicle of information to provide evidence of progress in the development process and to monitor the process.

What are the characteristics of good documentation?

Characteristics of good documentation

  • All relevant information must be recorded.
  • All paper records must be legible, signed and dated.
  • Records must be contemporaneous, accurate and kept up to date.
  • Records must be written in plain English avoiding jargon.

What is the principle of documentation?

Failure of the provider/licensee to meet the requirements of the regulations constitutes evidence of noncompliance regardless of the presence of outcomes. The purpose of these Principles of Documentation is to provide structure and consistency to the documentation of a citation.

What are the principles of sound documentation?

Write documentation from the reader’s point of view.

  • Write documentation from the reader’s point of view.
  • Avoid unnecessary repetition.
  • Avoid ambiguity.
  • Use a standard organization.
  • Record rationale.
  • Keep documentation current but not too current.
  • Review documentation for fitness of purpose.

Which characteristic is an advantage of effective documentation?

Effective documentation saves time in finding the client details, change in status, treatment plans, and the treatments administered. It minimizes error in treatment because all the details are mentioned in the document.

What are the disadvantages of narrative documentation?

Disadvantages They are most suitable for describing standard systems. Procedures for dealing with unusual transactions will normally have to be recorded using narrative notes. Major amendment is difficult without redrawing. Time can sometimes be wasted by charting areas that are of no audit significance.

What is considered timely documentation?

Progress notes should be documented in a timely, accurate, and legible manner. The frequency of documentation should occur as often as the patient’s condition warrants (e.g., once per day, to three times per day).

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