the-magical-marvels-of-mongodb-slides

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Recording Potion Views Time to start analyzing which potions are viewed the most. To do this, we need to record each potion page view. Potion Reviews Create or update existing log document Logs Collection Invisibility Score: 70 Taste: 4 Strength: 1 Love Score: 84 Taste: 3 Strength: 5 Shrinking Score: 94 Taste: 2 Strength: 3 More Info More Info More Info We’ll update count with each click { "_id": ObjectId(...), "potion": "Frog Tonic", "count": 1 }
Update a Document’s Count We can use the $inc operator to increment the count of an existing log document. Increments field by specified value Potion: “Shrink…” Count: 1 ... Update Potion: “Shrink..” Count: 2 ... > db.logs.update( {"potion": "Shrinking"}, {"$inc": {"count": 1}} ). If field doesn’t exist, it gets created with the value. SHELL Count incremented by 1 ! We can increment by any number, positive or negative!
Page 2 and 3: Example Application Potion Reviews
Page 4 and 5: Conjuring MongoDB Level 1 - Section
Page 6 and 7: MongoDB Comparison to SQL SQL Mongo
Page 8 and 9: Collections Group Documents Collect
Page 10 and 11: How Do We Interact With MongoDB? Al
Page 12 and 13: Using the Shell MongoDB comes with
Page 14 and 15: Inserting a Document Into a Collect
Page 16 and 17: Finding All Potions We can use the
Page 18 and 19: Conjuring MongoDB Level 1 - Section
Page 20 and 21: Finding a Specific Potion With a Qu
Page 22 and 23: What Else Can We Store? Documents a
Page 24 and 25: Adding Price and Score We can store
Page 26 and 27: Adding a List of Ingredients Arrays
Page 28 and 29: Embedded Documents We embed documen
Page 30 and 31: Finding Potions by Ingredients Arra
Page 32 and 33: What About Insert Validations? If w
Page 34 and 35: Validations Supported by MongoDB Mo
Page 36 and 37: Mystical Modifications Level 2 - Se
Page 38 and 39: Delete a Single Document The remove
Page 40 and 41: Delete Multiple Documents If our qu
Page 42 and 43: Updating a Document We can use the
Page 44 and 45: Update Without an Operator If the u
Page 48 and 49: Update a Non-existing Potion If we
Page 50 and 51: Updating Once More If we run the sa
Page 52 and 53: Improving Potions We rushed a bit d
Page 54 and 55: Updating a Field Name With $rename
Page 56 and 57: The Dilemma of Updating an Array Na
Page 58 and 59: Updating Single Array Value The $se
Page 60 and 61: Updating Values Without Knowing Pos
Page 62 and 63: Shrunken Conundrum Uh-oh — the sh
Page 64 and 65: Useful Update Operators MongoDB pro
Page 66 and 67: Removing the First or Last Value of
Page 68 and 69: Adding Unique Values to an Array Th
Page 70 and 71: Materializing Potions Level 3 - Sec
Page 72 and 73: Querying With Multiple Criteria We
Page 74 and 75: Comparison Query Operators We can u
Page 76 and 77: Finding Potions Between Prices We c
Page 78 and 79: Range Queries on an Array Each poti
Page 80 and 81: Be Careful When Querying Arrays Wit
Page 82 and 83: Not Matching a Document Conversely,
Page 84 and 85: Listing Our Best Potions We’re pu
Page 86 and 87: Excluding Fields Sometimes you want
Page 88 and 89: Either Select or Exclude Fields Whe
Page 90 and 91: Introducing the Cursor Whenever we
Page 92 and 93: Continuing to Iterate Through the C
Page 94 and 95: Sort by Price We want to implement
Page 96 and 97:
Paginating the Potions Page We only
Page 98 and 99:
Basic Pagination We can implement b
Page 100 and 101:
Morphing Models Level 4 - Section 1
Page 102 and 103:
Storing Favorites Within a User Use
Page 104 and 105:
Storing Vendor Information Each pot
Page 106 and 107:
Referencing Vendor Information Inst
Page 108 and 109:
Querying a Referenced Document In o
Page 110 and 111:
More Features of Embedded Documents
Page 112 and 113:
Referenced Documents Exist Independ
Page 114 and 115:
Dangers of Not Having Transactions
Page 116 and 117:
Choosing Which Route to Take When d
Page 118 and 119:
First Question: How Will the Data B
Page 120 and 121:
Second Question: What’s the Size
Page 122 and 123:
Third Question: Will the Data Chang
Page 124 and 125:
Embedding Comments in Potions We ca
Page 126 and 127:
Data Modeling Guidelines and Takeaw
Page 128 and 129:
Finding the Number of Potions Per V
Page 130 and 131:
Using the Aggregation Framework to
Page 132 and 133:
Field Paths Vs. Operators When valu
Page 134 and 135:
Averaging Potion Grade Per Vendor N
Page 136 and 137:
Using $max and $min Together Name:
Page 138 and 139:
Pulling Conditional Vendor Informat
Page 140 and 141:
How the Pipeline Works Each stage m
Page 142 and 143:
Grouping Potions With Data db.potio
Page 144 and 145:
Matching Potions Under $15 Query st
Page 146 and 147:
Grouping Potions by Vendor Group st
Page 148 and 149:
Limiting the Number of Documents We
Page 150 and 151:
Projections While Aggregating We ca
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