php - What is a Parent table and a Child table in Database? - Stack Overflow
For an example, an invoice class may define a parent-child relationship with a line The data for the children is subordinate to that of the parent, in a structure. If the first time you heard this phrase “parent-child relationship in MySQL”, hierarchal dependencies between records in a database table. In MySQL terms, it means say that “row 12 is the parent of row 14” and stuff like that. A relational database is a system structured to recognize () means that there is one child record for each individual parent record. Looking.
Once you learn how to build this kind of UI, you can do it from scratch but as this is a new topic for you, I will show you how to transform what we already have to the final state. We start with the basic listing and simple editing: We will want to reuse the old code name for a new UI element that defines the tabs, as it is the one that defines the editing UI as a whole.
Move the General UI element under the new Edit industry element by setting the parent element in the element properties. If you enabled breadcrumbs on your editing UI element earlier, you need to perform one more step. This will ensure that breadcrumbs and the related functionality will behave consistently.
The rule is that the UI element representing the editing UI as a whole should have the breadcrumbs enabled, and individual tabs should have the breadcrumbs disabled. Previous steps result in the following setup of UI elements, and editing interface with a single tab: You may notice that the tabs template automatically picked up the parent hierarchy, and displayed only the necessary UI aligned with the Kentico style guide.
This includes the back arrow at the top of the tabs. If you spot any suspicious behavior of the back arrow or during switching back and forth through the UI, your breadcrumbs are probably not configured correctly. There are more possible layout UI templates that you may want to use in more advanced scenarios, but Vertical tabs should suffice most of the time. Now is the time to finally add the Occupations tab with management capabilities.
Add a regular listing with new and edit UI elements as we did in the first module development article. To remind you, here is a brief list of steps: This gives us a UI to edit the occupations. BUT … when we switch to another industry, we will see the exact same listing, which is not what we want. This is because Kentico by default always displays all data of the given object type in listing to allow you to cover just any scenarios with them. We actually need to perform one more step to make this filter based on the parent edited object.
Navigate to the listing UI element properties, and set the listing where condition to the following value: I handle it by casting to integer to prevent invalid values that could harm my database. Read more about security in SQL in the article from my coleague. Now the UI properly filters the listing, and we can manage occupations of each industry independently and add the rest of the data. If you would want to add more child types to a single parent, the process is the same. You would just add another object type configured the same way, and another tab to the UI.
The next step is to get this information on an editing form of a contact. At this point, you should make sure that you read and understood my article about foreign keys in modules because the next steps will follow up on that.
Module development – Parent / Child relationships
We will start by adding an extra field to contacts just as we did in the foreign key article. After we add this field, the editing form will look like this: You can see that we get the exactly same full listing as we got in the first step of building the child object listing.
The reason for this is similar to the previous one: The second modification is to add following lines to the beginning of Reload method: Set up the following where condition in the occupation selector settings: If you would put it in as a macro through the small arrowit would be resolved earlier in the form life-cycle with the original value, not the current one.
Here is a screenshot of what you should see: Now, when we look at the contact editing form, we get the second dropdown filtered only to the children of the industry selected in the first dropdown, which is exactly what we wanted.
You can try to play with this and see how it will work for you. Note that if your Kentico version is a hotfix 8. In macros, only main objects are available as a base collection. You need to access child objects through a specific parent object.
All child collections are automatically registered as properties of the parent object. Occupations The name of each collection is derived the same way as for the main object collections, as described in my first module development article. In my case, it is MHM.
Here is the result view from the macro console for these macros and my data: Accessing child objects via API is similar to macros. You can access collections of child objects through the Children property of an object. Here is an example of a property that you can define in the parent info class: Most children develop a secure attachment when reunited with their caregiver after a temporary absence.
In contrast, some children with an insecure attachment want to be held, but they are not comfortable; they kick or push away. Others seem indifferent to the parent's return and ignore them when they return. The quality of the infant's attachment predicts later development. Youngsters who emerge from infancy with a secure attachment stand a better chance of developing happy and healthy relationships with others. The attachment relationship not only forms the emotional basis for the continued development of the parent-child relationship, but can serve as a foundation for future social connections.
Secure infants have parents who sensitively read their infant's cues and respond properly to their needs. Toddlerhood When children move from infancy into toddlerhood, the parent-child relationship begins to change.
During infancy, the primary role of the parent-child relationship is nurturing and predictability, and much of the relationship revolves around the day-to-day demands of caregiving: As youngsters begin to talk and become more mobile during the second and third years of life, however, parents usually try to shape their child's social behavior. In essence, parents become teachers as well as nurturers, providers of guidance as well as affection.
Socialization preparing the youngster to live as a member of a social group implicit during most of the first two years of life, becomes clear as the child moves toward his or her third birthday. Socialization is an important part of the parent-child relationship.
It includes various child-rearing practices, for example weaning, toilet training, and discipline. Dimensions of the parent-child relationship are linked to the child's psychological development, specifically how responsive the parents are, and how demanding they are. Responsive parents are warm and accepting toward their children, enjoying them and trying to see things from their perspective. In contrast, nonresponsive parents are aloof, rejecting, or critical. They show little pleasure in their children and are often insensitive to their emotional needs.
Some parents are demanding, while others are too tolerant. Children's healthy psychological development is facilitated when the parents are both responsive and moderately demanding. During toddlerhood, children often begin to assert their need for autonomy by challenging their parents. Sometimes, the child's newfound assertiveness during the so-called terrible twos can put a strain on the parent-child relationship.
It is important that parents recognize that this behavior is normal for the toddler, and the healthy development of independence is promoted by a parent-child relationship that provides support for the child's developing sense of autonomy.
In many regards, the security of the first attachment between infant and parent provides the child with the emotional base to begin exploring the world outside the parent-child relationship. Preschool Various parenting styles evolve during the preschool years. Preschoolers with authoritative parents are curious about new experiences, focused and skilled at playself-reliant, self-controlled, and cheerful.
School age During the elementary school years, the child becomes increasingly interested in peers, but this is not be a sign of disinterest in the parent-child relationship. Rather, with the natural broadening of psychosocial and cognitive abilities, the child's social world expands to include more people and settings beyond the home environment.
Module development – Parent / Child relationships
The parent-child relationship remains the most important influence on the child's development. Children whose parents are both responsive and demanding continue to thrive psychologically and socially during the middle childhood years.
During the school years, the parent-child relationship continues to be influenced by the child and the parents. In most families, patterns of interaction between parent and child are well established in the elementary school years. Adolescence As the child enters adolescencebiological, cognitive, and emotional changes transform the parent-child relationship.
The child's urges for independence may challenge parents' authority.
Many parents find early adolescence a difficult period. Adolescents fare best and their parents are happiest when parents can be both encouraging and accepting of the child's needs for more psychological independence.
Although the value of peer relations grows during adolescence, the parent-child relationship remains crucial for the child's psychological development.
Authoritative parenting that combines warmth and firmness has the most positive impact on the youngster's development.
Adolescents who have been reared authoritatively continue to show more success in school, better psychological development, and fewer behavior problems. Adolescence may be a time of heightened bickering and diminished closeness in the parent-child relationship, but most disagreements between parents and young teenagers are over less important matters, and most teenagers and parents agree on the essentials.
By late adolescence most children report feeling as close to their parents as they did during elementary school. Parenting styles Parenting has four main styles: Although no parent is consistent in all situations, parents do follow some general tendencies in their approach to childrearing, and it is possible to describe a parent-child relationship by the prevailing style of parenting. These descriptions provide guidelines for both professionals and parents interested in understanding how variations in the parent-child relationship affect the child's development.
Parenting style is shaped by the parent's developmental history, education, and personality; the child's behavior; and the immediate and broader context of the parent's life. Also, the parent's behavior is influenced by the parent's work, the parents' marriage, family finances, and other conditions likely to affect the parent's behavior and psychological well-being.
In addition, parents in different cultures, from different social classes, and from different ethnic groups rear their children differently. In any event, children's behavior and psychological development are linked to the parenting style with which they are raised. Authoritarian parents Authoritarian parents are rigid in their rules; they expect absolute obedience from the child without any questioning. They also expect the child to accept the family beliefs and principles without questions.
Authoritarian parents are strict disciplinarians, often relying on physical punishment and the withdrawal of affection to shape their child's behavior.
Children raised with this parenting style are often moody, unhappy, fearful, and irritable. They tend to be shy, withdrawn, and lack self-confidence. If affection is withheld, the child commonly is rebellious and antisocial. Authoritative parents Authoritative parents show respect for the opinions of each of their children by allowing them to be different.
Although there are rules in the household, the parents allow discussion if the children do not understand or agree with the rules. These parents make it clear to the children that although they the parents have final authority, some negotiation and compromise may take place.
Authoritative parents are both responsive and demanding; they are firm, but they discipline with love and affection, rather than power, and they are likely to explain rules and expectations to their children instead of simply asserting them. This style of parenting often results in children who have high self-esteem and are independent, inquisitive, happy, assertive, and interactive.
Permissive parents Permissive indulgent parents have little or no control over the behavior of their children. If any rules exist in the home, they are followed inconsistently. Underlying reasons for rules are given, but the children decide whether they will follow the rule and to what extent.
Parent-Child Relationships - baby, Definition, Description
They learn that they can get away with any behavior. Indulgent parents are responsive but not especially demanding.
They have few expectations of their children and impose little or inconsistent discipline. There are empty threats of punishment without setting limits. Role reversal occurs; the children act more like the parents, and the parents behave like the children.
Children of permissive parents may be disrespectful, disobedient, aggressive, irresponsible, and defiant. They are insecure because they lack guidelines to direct their behavior.
However, these children are frequently creative and spontaneous.