Source filtering in Elasticsearch - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to include only the title field in the search results.

Elasticsearch

{
  "_source": [1],
  "query": {
    "match_all": {}
  }
}

Drag options to blanks, or click blank then click option'

A["title"]

B["content"]

C["date"]

D["author"]

Attempts:

3 left

💡 Hint

Common Mistakes

Using a field name not present in the documents.

Not using an array for the fields.

The _source field controls which fields are returned. Using ["title"] returns only the title field.

2fill in blank

medium

Complete the code to exclude the comments field from the search results.

Elasticsearch

{
  "_source": {
    "excludes": [1]
  },
  "query": {
    "match_all": {}
  }
}

Drag options to blanks, or click blank then click option'

A["title"]

B["date"]

C["author"]

D["comments"]

Attempts:

3 left

💡 Hint

Common Mistakes

Using includes instead of excludes.

Not using an array for the field name.

Using "excludes": ["comments"] tells Elasticsearch to omit the comments field from the results.

3fill in blank

hard

Fix the error in the code to correctly include only the author and date fields.

Elasticsearch

{
  "_source": [1],
  "query": {
    "match_all": {}
  }
}

Drag options to blanks, or click blank then click option'

A["author", "date"]

B"author, date"

C{"author", "date"}

D"[author, date]"

Attempts:

3 left

💡 Hint

Common Mistakes

Using a string with comma-separated fields instead of an array.

Using curly braces which is invalid JSON here.

The _source field expects an array of field names. Option A correctly provides an array with two fields.

4fill in blank

hard

Fill both blanks to include only the title and summary fields, and exclude the comments field.

Elasticsearch

{
  "_source": {
    "includes": [1],
    "excludes": [2]
  },
  "query": {
    "match_all": {}
  }
}

Drag options to blanks, or click blank then click option'

A["title", "summary"]

B["author"]

C["comments"]

D["date"]

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up includes and excludes.

Not using arrays for the fields.

Use includes to specify fields to return and excludes to specify fields to omit.

5fill in blank

hard

Fill all three blanks to include the title field in uppercase, include the author field, and exclude the comments field.

Elasticsearch

{
  "_source": {
    "includes": [[1], [3]],
    "excludes": [[2]]
  },
  "script_fields": {
    "title_upper": {
      "script": {
        "source": "doc['title'].value.toUpperCase()"
      }
    }
  },
  "query": {
    "match_all": {}
  }
}

Drag options to blanks, or click blank then click option'

A"title"

B"author"

C"comments"

D"summary"

Attempts:

3 left

💡 Hint

Common Mistakes

Forgetting quotes around field names.

Putting the wrong fields in includes or excludes.

The includes array contains "title" and "author" fields, while excludes contains "comments". The script field creates an uppercase version of the title.