Search parameter in Rest API - Step-by-Step Execution

Concept Flow - Search parameter

Client sends request with search parameter

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Server receives request

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Server extracts search parameter

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Server filters data based on parameter

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Server sends filtered data back

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Client receives and displays results

The client sends a request with a search parameter; the server extracts it, filters data accordingly, and returns the filtered results.

Execution Sample

Rest API

GET /api/items?search=apple

// Server extracts 'search' parameter
// Filters items containing 'apple'
// Returns filtered list

This example shows a client requesting items containing 'apple' using a search parameter in the URL.

Execution Table

Step	Action	Search Parameter Extracted	Data Filtered	Response Sent
1	Client sends GET request with ?search=apple	search=apple	No	No
2	Server receives request	search=apple	No	No
3	Server extracts 'search' parameter	search=apple	No	No
4	Server filters data for items containing 'apple'	search=apple	Filtered list with 'apple'	No
5	Server sends filtered data back	search=apple	Filtered list with 'apple'	Yes
6	Client receives and displays results	search=apple	Filtered list with 'apple'	Yes

💡 Response sent after filtering data based on search parameter.

Variable Tracker

Variable	Start	After Step 3	After Step 4	Final
search_parameter	None	"apple"	"apple"	"apple"
filtered_data	All items	All items	Items containing 'apple'	Items containing 'apple'
response_sent	False	False	False	True

Key Moments - 2 Insights

Why does the server need to extract the search parameter before filtering?

Because the server must know what to look for in the data; extraction happens at Step 3 in the execution table before filtering at Step 4.

What happens if the search parameter is missing?

The server might return all data or no data depending on implementation; in this trace, filtering only happens after extracting a valid parameter at Step 3.

Visual Quiz - 3 Questions

Look at the execution table, at which step does the server filter the data?

A Step 4

B Step 3

C Step 2

D Step 5

💡 Hint

Check the 'Data Filtered' column in the execution table to see when filtering happens.

According to the variable tracker, what is the value of 'response_sent' after Step 4?

A True

B False

C None

D Unknown

💡 Hint

Look at the 'response_sent' row and the 'After Step 4' column in the variable tracker.

If the search parameter was 'banana' instead of 'apple', what would change in the execution table?

A No changes at all

B The response would be sent earlier

C The 'Search Parameter Extracted' would be 'banana' and filtered data would contain 'banana'

D The client would not receive any data

💡 Hint

Refer to the 'Search Parameter Extracted' and 'Data Filtered' columns in the execution table.

Concept Snapshot

Search parameter in REST API:
- Sent as query string (e.g., ?search=term)
- Server extracts parameter from request
- Server filters data based on parameter
- Server returns filtered results
- Client displays filtered data

Full Transcript

In a REST API, a search parameter is sent by the client as part of the URL query string. The server receives the request and extracts this parameter to understand what the client wants to find. Then, the server filters its data to include only items matching the search term. Finally, the server sends back the filtered data, and the client shows these results. This flow ensures the client gets only relevant information based on their search.