If you open click on the People link in the main navigation, you will see a paginated list of actors and directors.
People Search
A list of people can be retrieved by calling the http://localhost:3000/api/people endpoint.
The list is populated by the AllAsync() method in the PeopleService.
Unresolved directive in lesson.adoc - include::https://raw.githubusercontent.com/neo4j-graphacademy/llm-chatbot-python/main/Neoflix/Services/PeopleService.cs[tag=all]This person lists vary slightly from the movie lists because this features a Search by Name input.
When this value is set, an additional q parameter is passed to tx.RunAsync(), and if defined, the query adds an additional CONTAINS predicate.
MATCH (p:Person)
WHERE $q IS NULL OR p.name CONTAINS $q
RETURN p { .* } AS person
ORDER BY p.name ASC
SKIP $skip
LIMIT $limitUsing Text Indexes
TheSTARTS WITH, ENDS WITH and CONTAINS predicates are case-sensitive.
If you are looking for a case-insensitive search, you should consider setting up a full-text schema index.Your Task
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Modify the
AllAsync()method to query Neo4j and return a list of people. -
If the
qparameter is defined, theWHEREclause should check that thenameproperty contains the value provided.-
Hint: You can use a null check within the query to handle the case in the
WHEREclause when the parameter has no value.
-
-
Remember to auto-close the session and use the
ToListAsync()function within alist()function ontx.runresults to convert the values to native C# types. -
For sorting we have to use string-replacement again to set the field and direction to sort by
-
For pagination we can just pass the parameters from the
paramsobject
Click to reveal the completed AllAsync() method
Unresolved directive in lesson.adoc - include::https://raw.githubusercontent.com/neo4j-graphacademy/llm-chatbot-python/14-person-list/Neoflix/Services/PeopleService.cs[tag=all]Testing
To test that this functionality has been correctly implemented, run the following code in a new terminal session:
dotnet test --logger "console;verbosity=detailed" --filter "Neoflix.Challenges._14_PersonList"The test file is located at Neoflix.Challenges/14-PersonList.cs.
Are you stuck? Click here for help
If you get stuck, you can see a working solution by checking out the 14-person-list branch by running:
git checkout 14-person-listYou may have to commit or stash your changes before checking out this branch. You can also click here to expand the Support pane.
Verifying the Test
What is the name of the first person in the database in alphabetical order?
As part of the test suite, the final test will log the name of the first person to appear in the database in name order.
Paste the name of the person the box below without quotes or whitespace and click Check Answer.
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✓ 'Snub' Pollard
Hint
You can also find the answer by running the following Cypher statement:
MATCH (p:Person)
RETURN p.name
ORDER BY p.name ASC LIMIT 1Copy the answer without any double quotes or whitespace.
Lesson Summary
In this Challenge, you implemented the AllAsync() method in the PeopleService to return a paginated list of people from the Neo4j database and implemented a conditional WHERE clause on the Person name property.
In the next Challenge, you will retrieve an individual’s details from the database.