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  1. Kurzy
  2. Technical Training - Introduction to Development
  3. SQL constraints
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Domov └Technical Training - Introduction to Development └SQL constraints

Technical Training - Introduction to Development

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  • Nezaradené
    • [EN] Introduction to Development
  • [0] Introduction
    • [EN] Introduction
    • Introduction & prerequisites 20 xp
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      • Kvíz
    • The use case 20 xp
      • Kvíz
  • [1] Module Structure
    • [EN] Module Structure
    • What's a module ? 20 xp
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      • Kvíz
    • Module composition 10 xp
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      • Kvíz
    • Exercise
  • [2] Models & Fields
    • [EN] Models & Fields
    • ORM & models basics 10 xp
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      • Kvíz
    • ORM & models basics - demo
    • Fields & attributes 10 xp
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    • Fields & attributes - demo
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  • [3] Data introduction
    • [EN] Data introduction
    • Data introduction 10 xp
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  • [4] Introduction to Security
    • [EN] Introduction to Security
    • Introduction to Security - Theory 10 xp
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    • Introduction to Security - Code
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  • [5] Actions & Menus
    • [EN] Actions & Menus
    • Actions Introduction 10 xp
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    • Actions and Menus - Theory 10 xp
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    • Actions and Menus - Code 10 xp
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    • Exercise
  • [6] Basic Views
    • [EN] Basic Views
    • Views Introduction
    • Fields Attributes 10 xp
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    • Attributes Demo
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    • Exercise
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    • Basic Views 10 xp
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    • List views 10 xp
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    • Form Views 10 xp
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    • Search Introduction 10 xp
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      • Kvíz
    • Search Domains 10 xp
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    • Search Views 10 xp
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    • Search views - demo
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  • [7] Relational Fields
    • [EN] Relational Fields
    • Different Relations
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    • Many 2 one 10 xp
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    • Many 2 one - code
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    • One 2 many 10 xp
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    • Many 2 many 10 xp
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    • Many 2 many - code
    • Exercise
    • Relational Fields - End Demo
  • [8] Fields computation
    • [EN] Fields Computation
    • Compute Introduction 10 xp
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    • Compute Information
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    • Related Computes 10 xp
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    • Exercise
    • Multiple Records 10 xp
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    • Related Fields 10 xp
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      • Kvíz
    • Exercise
    • Inverse Functions 10 xp
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    • Computation demo (1)
    • Computation demo (2)
    • Computation demo (3)
    • Computation demo (4)
    • Demo - result
  • [9] Fields Onchange
    • [EN] Fields Onchange
    • Onchange Introduction 10 xp
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    • Onchange & Soft warnings 10 xp
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    • Onchange demo
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  • [10] Actions
    • [EN] Actions
    • Actions Introduction
    • Actions basics
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    • Action definition 10 xp
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      • Kvíz
    • Opening views 10 xp
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    • Raising errors 10 xp
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      • Kvíz
    • Actions demo
    • Exercise
  • [11] Constraints
    • [EN] Constraints
    • Introduction
    • SQL constraints 10 xp
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      • Kvíz
    • Python constraints 10 xp
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      • Kvíz
    • Constraints technicalities
    • Constraints demo
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  • [12] Inline Views
    • [EN] Inline Views
    • Inline view introduction 10 xp
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    • Inline view definition
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  • [13] Widgets
    • [EN] Widgets
    • Widgets Introduction 10 xp
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    • Widgets Definition 10 xp
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    • Widgets Demo
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  • [14] Ordering
    • [EN] Ordering
    • Ordering Introduction 10 xp
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    • Model Ordering 10 xp
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    • Manual Ordering 10 xp
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    • Ordering Demo
    • Ordering Demo result
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  • [15] Advanced Views
    • [EN] Advanced Views
    • Advanced Views Intro
    • Views evolution 10 xp
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    • Fields Attributes 10 xp
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    • List View Attributes 10 xp
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    • Views Decorators
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    • Views Code Improvement
    • Exercise
  • [16] Advanced searches
    • [EN] Advanced searches
    • Advanced Searches Intro
    • Default Search 10 xp
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    • Filter Domain 10 xp
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    • Advanced Searches Demo
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  • [17] More buttons
    • [EN] More buttons
    • More Buttons
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    • Stat Button Definition
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    • Stat Button demo (1)
    • Stat Button demo (2)
    • Stat Button demo result
    • Exercise
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  • [18] Model Inheritance
    • [EN] Model Inheritance
    • Inheritance Introduction
    • CRUD Inheritance
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    • CRUD demo
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    • Class Inheritance
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    • Class Inheritance - demo
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    • Prototype Inheritance
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    • Prototype Inheritance - demo
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    • Delegation Inheritance
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  • [19] View Inheritance
    • [EN] View Inheritance
    • View Inheritance Introduction
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    • Single Node Modification
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    • Xpath - expr
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    • Xpath - Position
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    • Xpath - Position=attributes
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    • Exercise
  • [END]
    • [END]

SQL constraints

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1. Where do I define a new SQL constraint ?
In each model, in the attribute "_constraints" In each model, in the attribute "_sql_constraints" In the security folder, in an SQL file named "_sql_constraints" In the security folder, in an SQL file named "_constraints"
2. What type of SQL constraint can you use ?
Check Not-Null Unique Primary Keys Foreign Keys Exclusion None
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