This document discusses different data modeling techniques for MongoDB including embedding documents, linking documents by ID, and handling many-to-many relationships. It provides code examples of saving documents, querying, and updating in MongoDB. It also briefly covers software testing strategies for MongoDB applications.

15. 


16. Redis

24. › SET note1:title "Mittag"
› SET note1:message "nicht vergessen"
› KEYS note1:*
› GET note1:title
› DEL note1:title note1:message

29. http://bit.ly/ISv9f6

31. R venDB
a

34. ›
›

35. ›

36. ›
›
›
›

38. ›

39. ›
›

41. ›
›
›
›

42. using (var documentStore = new EmbeddableDocumentStore{
RunInMemory = true}.Initialize())
{
using (var session = documentStore.OpenSession())
{
// Run complex test scenarious
}
}

43. ›
›
›
›
›

44. Ayende Rahien on the HTTP API - http://ravendb.net/documentation/docs-http-api-restful

45. ›
›
›
C:>curl -X GET http://localhost:8080/docs/Categories/1 -i
HTTP/1.1 200 OK
Content-Type: application/json; charset=utf-8
ETag: 00000000-0000-0200-0000-000000000004
{
"Name" : "Normal Importance",
"Color" : "green"
}

47. var notes = session var notes = session.Advanced
.Query<Note>() .LuceneQuery<Note>()
.Where(n => n.Category == "Important") .Where("Category:Important")
.ToArray(); .ToArray();

48. MongoDB

54. CODASYL model SQL Agile becoming more Google MongoDB initial
published invented popular BigTable release
IBM’s Oracle Brewer’s Amazon
IMS INGRES founded CAP born Dynamo
1966 1969 1970 1973 1974 1977 1985 1990’s 2000 2004 2007 2008 2009
10gen NoSQL
Codd publishes Term “object-oriented founded Movement
relational model paper database” appears
in 1970 Apache Cassandra
initial release

57. ›
›
›

59. –
› use WebNote
› db.Notes.save(
{
Title: 'Mittag',
Message: 'nicht vergessen‘
}
);
› db.Notes.save

60. –
for(i=0; i<1000; i++) {
['quiz', 'essay', 'exam'].forEach(function(name) {
var score = Math.floor(Math.random() * 50) + 50;
db.scores.save({student: i, name: name, score:
score});
});
}
db.scores.count();

61. –
› db.Notes.find();
› db.Notes.find({ Title: /Test/i });
› db.Notes.find(
{ "Categories.Color": "red"}).limit(1);

62. –
› db.Notes.update({Title: 'Test'},
{'$set': {Categories: []}});
› db.Notes.update({Title: 'Test'},
{'$push': {
Categories:
{Color: 'Red'}
}
});

63. –
› db.dropDatabase();
› db.Notes.drop();
› db.Notes.remove();

66. Consistency

80. Hands ON!

82. use digg
db.stories.findOne();

84. › use digg;
› db.people.update({name: 'Smith'},
{'$set': {interests: []}});
› db.people.update({name: 'Smith'},
{'$push': {interests: ['chess']}});

88. var map = function() {
emit(this.user.name, {diggs: this.diggs,
posts: 0});
};

89. var reduce = function(key, values) {
var diggs = 0;
var posts = 0;
values.forEach(function(doc) {
diggs += doc.diggs;
posts += 1;
});
return {diggs: diggs, posts: posts};
};

90. db.stories.mapReduce(map, reduce, {out:
'digg_users'});
db.digg_users.find();

93. JaWOHL!

94. Schema
Design

96. http://bsonspec.org

97. 

108. > db.shapes.find()
› { _id: "1", type: "c", area: 3.14, radius: 1}
› { _id: "2", type: "s", area: 4, length: 2}
› { _id: "3", type: "r", area: 10, length: 5, width: 2}
// Shapes mit radius > 0 finden
> db.shapes.find( { radius: { $gt: 0 } } )

110. blogs: {
author : “Johannes",
date : ISODate("2011-09-18T09:56:06.298Z"),
comments : [
{
author : “Klaus",
date : ISODate("2011-09-19T09:56:06.298Z"),
text : “toller Artikel"
}
]
}

112. blogs: { _id: 1000,
author: “Johannes",
date: ISODate("2011-09-18"),
comments: [ {comment : 1)} ]}
comments : { _id : 1,
blog: 1000,
author : “Klaus",
date : ISODate("2011-09-19")}
> blog = db.blogs.find({ text: "Destination Moon" });
> db.comments.find( { blog: blog._id } );

114. // Jedes Produkt verlinkt die IDs der Kategorien
products:
{ _id: 10, name: "Destination Moon",
category_ids: [ 20, 30 ] }

115. // Jedes Produkt verlinkt die IDs der Kategorien
products:
{ _id: 10, name: "Destination Moon",
category_ids: [ 20, 30 ] }
// Jede Kategorie verlinkt die IDs der Produkte
categories:
{ _id: 20, name: "adventure",
product_ids: [ 10, 11, 12 ] }
categories:
{ _id: 21, name: "movie",
product_ids: [ 10 ] }

116. // Jedes Produkt verlinkt die IDs der Kategorien
products:
{ _id: 10, name: "Destination Moon",
category_ids: [ 20, 30 ] }
// Jede Kategorie verlinkt die IDs der Produkte
categories:
{ _id: 20, name: "adventure",
product_ids: [ 10, 11, 12 ] }
categories:
{ _id: 21, name: "movie",
product_ids: [ 10 ] }
// Alle Kategorien für ein Produkt
> db.categories.find( { product_ids: 10 } )

118. // Jedes Produkt verlinkt die IDs der Kategorien
products:
{ _id: 10, name: "Destination Moon",
category_ids: [ 20, 30 ] }
// Kategorien beinhalten keine Assoziationen
categories:
{ _id: 20,
name: "adventure"}

119. // Jedes Produkt verlinkt die IDs der Kategorien
products:
{ _id: 10, name: "Destination Moon",
category_ids: [ 20, 30 ] }
// Kategorien beinhalten keine Assoziationen
categories:
{ _id: 20,
name: "adventure"}
// Alle Produkte für eine Kategorie
> db.products.find( { category_ids: 20 } )

120. // Jedes Produkt verlinkt die IDs der Kategorien
products:
{ _id: 10, name: "Destination Moon",
category_ids: [ 20, 30 ] }
// Kategorien beinhalten keine Assoziationen
categories:
{ _id: 20,
name: "adventure"}
// Alle Produkte für eine Kategorie
> db.products.find( { category_ids: 20 } )
// Alle Kategorien für ein Produkt product
> product = db.products.find( { _id: some_id } )
> db.categories.find({_id: {$in : product.category_ids}})

122. Software Tests

125. 

