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Academy 3T

  • MongoDB 101: Getting Started
  • MongoDB 201: Querying MongoDB Data
  • MongoDB 301: Aggregation

Lesson 7, Exercise 3: Modifying and deleting a MongoDB view

MongoDB 201: Querying MongoDB Data Working with MongoDB Views Lesson 7, Exercise 3: Modifying and deleting a MongoDB view

In this exercise, you’ll update the package_totals view by changing the name of the prio_support field to priority_support. After you save your changes, you’ll then delete the view.

To modify and delete the view

1. In Connection Tree, right-click the package_totals view node, and then click Edit View.

Studio 3T launches the View Editor in its own tab, as shown in the following figure.

The tab is nearly identical to the one used when creating the view, except that it now includes the Update View button, rather than Create View.

2. Go to the Stage 3 tab and, in the third line of code, replace the first instance of the string prio_support with the name priority_support, retaining the quotation marks.

This renames the output column for this stage only. The Stage 3 code should now look like the following expression:

{ 
    "package" : "$_id.package", 
    "priority_support" : "$_id.prio_support", 
    "transactions" : "$SUM(transactions)", 
    "_id" : 0
}

3. Go to the Stage 4 tab and, in the third line of code, replace the string prio_support with the word priority_support, retaining the quotation marks. This ensures that sorting is based on the correct field.

The Stage 4 code should now look like the following expression:

{ 
    "package" : 1, 
    "priority_support" : 1
}

You can, of course, make whatever changes to the pipeline stages you think necessary, as long as you ensure that the code remains viable. For now, however, these minor changes are enough to demonstrate the concept of editing a view.

4. Go to the Pipeline tab and press F5 to run the pipeline stages. This ensures that your changes will give you the expected results.

5. Click the Update View button on the View Editor toolbar. Studio 3T saves your changes to the view definition and opens the view on the package_totals view tab, which is shown in the following figure.

Update view priority

As you can see, the prio_support field name has been renamed to priority_support. Everything else remained the same.

Exercise caution when updating a view, especially if changing an output field name. You might inadvertently break an application that references the view.

6. Close the package_totals view tab, and then close the View Editor. If prompted to save changes, click Discard.

7. In the Connection Tree, right-click the package_totals view node, and then click Drop View.

8. In the Drop View dialog box, click Drop View. Studio 3T permanently removes the view from the sales databases.

9. Close Studio 3T.

Next – Test your skills: Working with MongoDB Views
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  • Course Home Expand All
    Performing MongoDB CRUD Operations
    4 Topics | 1 Quiz
    Lesson 1, Exercise 1: Adding a document to a collection
    Lesson 1, Exercise 2: Viewing a document in a collection
    Lesson 1, Exercise 3: Updating a document in a collection
    Lesson 1, Exercise 4: Deleting a document from a collection
    Test your skills: Performing CRUD Operations
    Building MongoDB find() Queries
    4 Topics | 1 Quiz
    Lesson 2: The MongoDB find method
    Lesson 2, Exercise 1: Using IntelliShell to build and run find statements
    Lesson 2, Exercise 2: Using Visual Query Builder to build and run find statements
    Lesson 2, Exercise 3: Using Query Code and IntelliShell to modify and run a find statement
    Test your skills: Building MongoDB find() Queries
    Working with the MongoDB Aggregation Pipeline
    6 Topics | 1 Quiz
    Lesson 3: Introducing the MongoDB aggregate method
    Lesson 3, Exercise 1: Filtering the documents in the aggregation pipeline
    Lesson 3, Exercise 2: Grouping the documents in the aggregation pipeline
    Lesson 3, Exercise 3: Adding and removing fields in the aggregation pipeline
    Lesson 3, Exercise 4: Changing the field order in the aggregation pipeline
    Lesson 3, Exercise 5: Sorting the documents in the aggregation pipeline
    Test your skills: Working with the MongoDB Aggregation Pipeline
    Querying Arrays Using MongoDB $elemMatch
    3 Topics | 1 Quiz
    Lesson 4, Exercise 1: Using IntelliShell to query single and multiple values in an array
    Lesson 4, Exercise 2: Using Visual Query Builder to query a single array value
    Lesson 4, Exercise 3: Using Visual Query Builder to query multiple array values
    Test your skills: Querying Arrays Using MongoDB $elemMatch
    Querying Embedded Documents in MongoDB Arrays
    3 Topics | 1 Quiz
    Lesson 5, Exercise 1: Using the $elemMatch operator to query embedded documents
    Lesson 5, Exercise 2: Using conditional operators to query embedded documents
    Lesson 5, Exercise 3: Using Visual Query Builder to query embedded documents
    Test your skills: Querying Embedded Documents in Arrays
    Querying MongoDB with SQL SELECT Statements
    2 Topics | 1 Quiz
    Lesson 6, Exercise 1: Using the SQL Query tool to run SQL statements
    Lesson 6, Exercise 2: Using the SQL Query tool to aggregate collection data
    Test your skills: Querying MongoDB with SQL
    Working with MongoDB Views
    3 Topics | 1 Quiz
    Lesson 7, Exercise 1: Creating a MongoDB view
    Lesson 7, Exercise 2: Querying a MongoDB view
    Lesson 7, Exercise 3: Modifying and deleting a MongoDB view
    Test your skills: Working with MongoDB Views
    Course Extras
    Return to MongoDB 201: Querying MongoDB Data
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