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  • Book Overview & Buying Neo4j Graph Data Modelling
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Neo4j Graph Data Modelling

Neo4j Graph Data Modelling

By : Mahesh K Lal
3 (1)
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Neo4j Graph Data Modelling

Neo4j Graph Data Modelling

3 (1)
By: Mahesh K Lal
Buy this Book

Overview of this book

If you are a developer who wants to understand the fundamentals of modeling data in Neo4j and how it can be used to model full-fledged applications, then this book is for you. Some understanding of domain modeling may be advantageous but is not essential.
Table of Contents (11 chapters)
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Preface
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Preface
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What this book covers
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What you need for this book
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Who this book is for
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Conventions
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Reader feedback
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Customer support
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1
1. Graphs Are Everywhere
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1. Graphs Are Everywhere
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Graphs in mathematics
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The property graph model
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Storage – native graph storage versus non-native graph storage
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Reasons to use graph databases
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What to use a graph database for
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Choosing Neo4j for exploring graph databases
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The structure of the book
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Summary
2
2. Modeling Flights and Cities
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2. Modeling Flights and Cities
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Graphs are more than social
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Designing a system to get a travel itinerary
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Introduction to modeling nodes and relationships
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Using Cypher to operate on Neo4j
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Creating cities in Neo4j
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Indices
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Adding flights to Neo4j
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Traversing relationships
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Summary
3
3. Formulating an Itinerary
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3. Formulating an Itinerary
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Creating an itinerary from flights and cities
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Business logic should lie in code
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Summary
4
4. Modeling Bookings and Users
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4. Modeling Bookings and Users
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Building a data model for booking flights
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A simple model of the bookings ecosystem
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Modeling bookings in an RDBMS
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Creating bookings and users in Neo4j
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Queries to find journeys and bookings
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Queries to find the booking history of a user
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Summary
5
5. Refactoring the Data Model
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5. Refactoring the Data Model
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Capturing information about hotels at airports
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Modeling airports and hotels
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Extracting airport information from flights
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Reasons for not migrating using a single query
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Adding hotels to airports
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Fetching hotels
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Summary
6
6. Modeling Communication Chains
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6. Modeling Communication Chains
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Capturing traveler reviews for hotels
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A model for reviews and comments
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Adding reviews to Neo4j
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Adding comments to Neo4j
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Summary
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7. Modeling Access Control
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7. Modeling Access Control
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Controlling access for content change
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Modeling hierarchies
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Modeling access control groups and employees
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Querying the data model to find what is accessible to an employee
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Summary
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8. Recommendations and Analysis of Historical Data
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8. Recommendations and Analysis of Historical Data
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Recommending cities to travelers
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Recommending hotels to travelers
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Analysis of the historical data
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Summary
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9. Wrapping Up
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9. Wrapping Up
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There is no correct model
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Further reading and exploration
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What to watch out for while using Neo4j
10
Index
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Index

Creating an itinerary from flights and cities

We modelled cities and flights in the previous chapter. In this chapter, our primary focus will be on creating an itinerary from the graph we have. A few considerations while we are fetching the itinerary are as follows:

  • Even if there is no direct flight from city A to city B, most people are comfortable with two or less stopovers/changes of flights
  • If there is a change of flights or stopover involved, the stopover should be at least for two hours so that the travelers can change flights in spite of any unforeseen delays

Information and paths

In a graph, we discover information by traversing the nodes and relationships from some starting node or nodes. Collectively, the start node, the end node, the relationships, and intermediate nodes together consist of a path. We define the path using the node labels and relationship types. Writing queries with node labels and relationship types allows the query to be expressive.

Using Cypher to find a path

In...

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