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Basic qweb operations

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Qweb is a templating engine or reporting engine which can be used to create reports.
Odoo uses Qweb for generating reports.
Qweb provides several tools for creating a report.
By using Qweb, we can manipulate the data very easily.

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Basic qweb operations

  1. 1. www.cybrosys.com Basic Qweb Operations
  2. 2. INTRODUCTION • Qweb is a templating engine or reporting engine which can be used to create reports. • Odoo uses Qweb for generating reports. • Qweb provides several tools for creating a report. • By using Qweb, we can manipulate the data very easily.
  3. 3. • Basic Features Available In Qweb For Creating A Report is discussed. • We Use XML Attributes Prefixed By ‘T-’ For Performing The Operations. • Just Like Any Other Programming Language, We Can Define A New Variable, Assign A Value To It, And Use It In Our Template.
  4. 4. How to define a variable t-set can be used to define a new variable and set its value. Syntax is,
  5. 5. Example: • This will create a new variable ‘count’ and set its value to zero. • We can set the value of the value of this variable using a function.
  6. 6. • Here, the value of ‘count’ will be the value returned from the function ‘my_function’. • When we define a variable, we don’t need to specify a specific type of this variable. • We can have several types of values such as numbers, strings, arrays(lists) and dictionaries etc. • If we need to define a dictionary, we can achieve it like this, • Just like this, we can use lists also. • Iterating over the different values of a list or dictionary can be achieved by using a loop.
  7. 7. Output • In order to output a value, qweb provides t-esc and t-raw directives. • The commonly used one is t-esc. • t-esc will evaluate the variable and print the content of that variable • The difference between t-esc and t-raw is, t-esc will automatically HTML-escape its content while t-raw won’t.
  8. 8. Conditional Operators • After setting a variable, we can perform our operations on that variable. • We can use t-if to perform any conditional operations. • The basic syntax is as follows.
  9. 9. Example: • This will first check the value of ‘count’ is zero or not. • If yes, the contents inside the t-if will be executed. • The ‘else’ condition can be achieved by using a ‘not’ before the condition in the t-if tag. • The ‘not’ can be used to reverse the condition. i.e just like the else condition.
  10. 10. Example: If we need to include multiple conditions, we can achieve this by using ‘and’ or ‘or’.
  11. 11. Loops • In some cases, we may need to iterate over a set of values. • Suppose we have a list or a dictionary with us and we need to iterate through each value, in this case, we can use t-for each for this purpose. • This will iterate over the list [1, 2, 3] and prints each element one by one.
  12. 12. Calling Other Templates Calling other templates from qweb can be achieved using the t-call directive. This can be used for top-level rendering or within a template.
  13. 13. Handling Fields • When we are handling fields, we can use t-field directive ( the result of the browser method). • t-field-options can be used for customizing these fields. • The widget is one of the most common options used with t-field options. • We can have different types of widgets for different types of values.
  14. 14. Refer this link for more: https://www.cybrosys.com/blog/basic-qweb-operations
  15. 15. Thank You ! Cybrosys Technologies Pvt. Ltd. Neospace, Kinfra Techno Park, Kakkancherry, Calicut University P.O. Calicut Kerala, India - 673635. Cybrosys Ltd 15, ST Antonys Road, Forest Gate, London England, E79QA. Cybrosys Technologies Pvt. Ltd. 1st Floor, Thapasya Building, Infopark, Kakkanad, Kochi, Kerala, India-682030.

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