panpsychism/server_hw_resources/vampires_mongo/vampires_mongo_instructions.md

WDI-PANTHALASSA

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Title: Vampires - Raw Mongo Queries
Type: Homework
Duration: single night
Adapted by: Thom Page
Course: WDIr-Panthalassa

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Vampires!

Setup

1. Start mongod

2. Open your mongo console with mongo. Note: This homework is done in the terminal, there is no Express.

3. Connect to a new database called monsters with use monsters

4. Using the js objects of vampires in populateVampires.js, add the vampires to a vampires collection. Hint: you can use the Adding Losts of New Documents syntax from the example at the bottom of this document.

Resources

Utilize the following resources to research the commands you will need

[https://docs.mongodb.org/manual/reference/operator/query/#query-selectors]

[http://mongoosejs.com/]

MONGO SELECTION COMMANDS

For the following parts, write mongo queries in your CLI, and when you figure out the right answer, copy the correct mongo queries into a selectVampires.md file in your homework folder.

Part 1

Select by comparison

Select all the vampires that:

• have greater than 500 victims
• have fewer than or equal to 150 victims
• have a victim count is not equal to 210234
• have greater than 150 AND fewer than 500 victims

---

** Commit your work.**
The commit message should read:
"Commit 1: Select by comparison".

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Part 2

Select by exists or does not exist

Select all the vampires that:

• have a title property
• do not have a victims property
• have a title AND no victims
• have victims AND the victims they have are greater than 1000

---

** Commit your work.**
The commit message should read:
"Commit 2: Select by exists".

---

Part 3

Select objects that match one of several values

Select all the vampires that:

• love either frilly shirtsleeves or frilly collars
• love brooding
• love at least one of the following: appearing innocent, trickery, lurking in rotting mansions, R&B music
• love fancy cloaks but not if they also love either top hats or virgin blood * Hint-You will also have to use $nin *

---

** Commit your work.**
The commit message should read:
"Commit 3: Select matching objects".

---

Part 4

Select with OR

Select all the vampires that:

• are from New York, New York, US or New Orleans, Louisiana, US
• love brooding or being tragic
• have more than 1000 victims or love marshmallows
• have red hair or green eyes

---

** Commit your work.**
The commit message should read:
"Commit 4: Select with OR".

---

Part 5

Negative Selection

Select all vampires that:

• love ribbons but do not have blonde hair
• are not from Rome
• do not love any of the following: [fancy cloaks, frilly shirtsleeves, appearing innocent, being tragic, brooding]
• have not killed more than 200 people

---

** Commit your work.**
The commit message should read:
"Commit 5: Negative selection".

---

Part 6

Replacing a record

Replace the following:

• replace the vampire called 'Claudia' with a vampire called 'Eve'. 'Eve' will have a key called 'portrayed_by' with the value 'Tilda Swinton'
• replace the first male vampire with another whose name is 'Guy Man', and who has a key 'is_actually' with the value 'were-lizard'

---

** Commit your work.**
The commit message should read:
"Commit 6: Replacing a record".

---

Part 7

Update single values

Update the following:

• Update 'Guy Man' to have a gender of 'm'
• Update 'Eve' to have a gender of 'f'
• Update 'Guy Man' to have an array called 'hates' that includes 'clothes' and 'jobs'
• Update 'Guy Man's' hates array also to include 'alarm clocks' and 'jackalopes'
• Rename 'Eve's' name field to 'moniker'

---

** Commit your work.**
The commit message should read:
"Commit 7: Replacing a record".

---

Part 8

Remove documents

https://docs.mongodb.org/manual/tutorial/remove-documents/

• Remove a single document wherein the hair_color is 'brown'
• Remove all documents wheren the eye-color is 'green'

---

** Commit your work.**
The commit message should read:
"Commit 8: Remove documents".

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Adding Lots of New Documents in plain Mongo

Pretend we have a collection called people and want to add lots of documents, we can simply provide this array to the insert method and it will create a document for each object in the array.

[
  {
    "name": "Emma",
    "age": 20
  },
  {
    "name": "Ray",
    "age": 45
  },
  {
    "name": "Celeste",
    "age": 33
  },
  {
    "name": "Stacy",
    "age": 53
  },
  {
    "name": "Katie",
    "age": 12
  },
  {
    "name": "Adrian",
    "age": 47
  }
]

Note: Be sure to type the closing parenthesis of the insert method!

db.people.insert([array])